Peter here is simply repeating what Christ had already told him and us in:

Mat 13:9  Who hath ears to hear, let him hear.
Mat 13:10  And the disciples came, and said unto him, Why speakest thou unto them in parables?
Mat 13:11  He answered and said unto them, Because it is given unto you to know the mysteries of the kingdom of heaven, but to them it is not given.
Mat 13:12  For whosoever hath, to him shall be given, and he shall have more abundance: but whosoever hath not, from him shall be taken away even that he hath.
Mat 13:13  Therefore speak I to them in parables: because they seeing see not; and hearing they hear not, neither do they understand.
Mat 13:14  And in them is fulfilled the prophecy of Esaias, which saith, By hearing ye shall hear, and shall not understand; and seeing ye shall see, and shall not perceive:
Mat 13:15  For this people’s heart is waxed gross, and their ears are dull of hearing, and their eyes they have closed; lest at any time they should see with their eyes, and hear with their ears, and should understand with their heart, and should be converted, and I should heal them.
Mat 13:16  But blessed are your eyes, for they see: and your ears, for they hear.
Mat 13:17  For verily I say unto you, That many prophets and righteous men have desired to see those things which ye see, and have not seen them; and to hear those things which ye hear, and have not heard them.

Who has blinded all of mankind for all these years? The answer is very clear:

Rom 11:8  (According as it is written, God hath given them the spirit of slumber, eyes that they should not see, and ears that they should not hear;) unto this day. 

The scriptures tell us ever so plainly that it is God who makes the wicked for the day of evil within all of us. He makes us to err from His ways, and then He tells us to return to Him, and He is the One who deceives each and every deceived prophet:

Psa 90:2  Before the mountains were brought forth, or ever thou hadst formed the earth and the world, even from everlasting to everlasting, thou art God.
Psa 90:3  Thou turnest man to destruction; and sayest, Return, ye children of men.

Pro 16:4  The LORD hath made all things for himself: yea, even the wicked for the day of evil.

Eze 14:9  And if the prophet be deceived when he hath spoken a thing, I the LORD have deceived that prophet, and I will stretch out my hand upon him, and will destroy him from the midst of my people Israel.

Isa 63:17  O LORD, why hast thou made us to err from thy ways, and hardened our heart from thy fear? Return for thy servants’ sake, the tribes of thine inheritance.

All of this being true, it is incumbent upon a loving heavenly Father to redeem His creation which He made wicked, turned to destruction, deceived and made to err from His ways. That is exactly what we are told He is in the process of doing:

Joh 3:17  For God sent not his Son into the world to condemn the world; but that the world through him might be saved.

Christ came into this world “that the world through Him might be saved”. The word ‘might’ is not in the Greek and what Christ was sent by His Father to accomplish Christ will accomplish and He “will have all men to be saved and to come to the knowledge of the Truth”:

1Ti 2:3  For this is good and acceptable in the sight of God our Saviour;
1Ti 2:4  Who will have all men to be saved, and to come unto the knowledge of the truth.

Lest we think this is a wishful desire on God’s part, this is what we are told about anything Christ desires:

Job 23:13  But he is in one mind, and who can turn him? and what his soul desireth, even that he doeth.

The same epistle of 1 Timothy we read these words about exactly what is meant by “all men” in 1Ti 2:4:

1Ti 4:10  For therefore we both labour and suffer reproach, because we trust in the living God, who is the Saviour of all men, specially [but not exclusively] of those that believe.

Peter concurs with Paul and with Christ:

2Pe 3:9  The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance.

And again, lest we think that Christ’s “propitiatory sacrifice” suffices only for believers, we are again plainly told otherwise as it concerns “the dispensation of the fulness of times”:

1Jn 2:2  And he is the propitiation for our [believers only] sins: and not for ours only, but also for the sins of the whole world.

So this is the wonderful secret which is hidden from the eyes of the world, even though they can see and read all these verses in their own Bibles. They have eyes that see but do not perceive, and they have ears that hear but they do not understand this Truth:

1Co 15:22  For as in Adam all die, even so in Christ shall all be made alive.
1Co 15:23  But every man in his own order: Christ the firstfruits; afterward they that are Christ’s at his coming.
1Co 15:24  Then cometh the end, [“great white throne judgment] when he shall have delivered up the kingdom to God, even the Father; when he shall have put down all rule and all authority and power.
1Co 15:25  For he must reign, till he hath put all enemies under his feet.
1Co 15:26  The last enemy that shall be destroyed is death.
1Co 15:27  For he hath put all things under his feet. But when he saith all things are put under him, it is manifest that he is excepted, which did put all things under him.
1Co 15:28  And when all things shall be subdued unto him, then shall the Son also himself be subject unto him that put all things under him, that God [through Christ] may be all in all.

So we are back to the secret which has been hidden from generations;

1Co 2:7  But we speak the wisdom of God in a mystery, even the hidden wisdom, which God ordained before the world unto our glory:

Col 1:25  Whereof I am made a minister, according to the dispensation of God which is given to me for you, to fulfil the word of God;
Col 1:26  Even the mystery which hath been hid from ages and from generations, but now is made manifest to his saints:

Christ tells us the “prophets and many righteous men” of the Old Testament desired to see what we see and could not see it. However, we have been blessed to see and to know that He came to save all in Adam and in the heavens and in the earth and under the earth:

Mat 13:13  Therefore speak I to them in parables: because they seeing see not; and hearing they hear not, neither do they understand.
Mat 13:14  And in them is fulfilled the prophecy of Esaias, which saith, By hearing ye shall hear, and shall not understand; and seeing ye shall see, and shall not perceive:
Mat 13:15  For this people’s heart is waxed gross, and their ears are dull of hearing, and their eyes they have closed; lest at any time they should see with their eyes, and hear with their ears, and should understand with their heart, and should be converted, and I should heal them.
Mat 13:16  But blessed are your eyes, for they see: and your ears, for they hear.
Mat 13:17  For verily I say unto you, That many prophets and righteous men have desired to see those things which ye see, and have not seen them; and to hear those things which ye hear, and have not heard them.

I pray that the Lord has given you eyes that see and ears which hear all these verses of scripture which reveal the secret that God through Christ is saving all in Adam and “all things in heaven and in the earth” and is in His time and through the second death, which is the lake of fire, purifying even the wicked angels and their father the devil:

Col 1:16  For by him were all things created, that are in heaven, and that are in earth, visible and invisible, whether they be thrones, or dominions, or principalities, or powers: all things were created by him, and for him:
Col 1:17  And he is before all things, and by him all things consist.
Col 1:18  And he is the head of the body, the church: who is the beginning, the firstborn from the dead; that in all things he might have the preeminence.
Col 1:19  For it pleased the Father that in him should all fulness dwell;
Col 1:20  And, having made peace through the blood of his cross, by him to reconcile all things unto himself; by him, I say, whether they be things in earth, or things in heaven.

The great white throne is “white”. It is not a ‘black throne judgment’, and it is “judgment”:

Rev 20:11  And I saw a great white throne, and him that sat on it, from whose face the earth and the heaven fled away; and there was found no place for them.
Rev 20:12  And I saw the dead, small and great, stand before God; and the books were opened: and another book was opened, which is the book of life: and the dead were judged out of those things which were written in the books, according to their works.
Rev 20:13  And the sea gave up the dead which were in it; and death and hell delivered up the dead which were in them: and they were judged every man according to their works.
Rev 20:14  And death and hell were cast into the lake of fire. This is the second death.
Rev 20:15  And whosoever was not found written in the book of life was cast into the lake of fire [to be judged and purified by that ‘fiery’ judgment’].

This is what all judgments do:

Isa 26:8  Yea, in the way of thy judgments, O LORD, have we waited for thee; the desire of our soul is to thy name, and to the remembrance of thee.
Isa 26:9  With my soul have I desired thee in the night; yea, with my spirit within me will I seek thee early: for when thy judgments are in the earth, the inhabitants of the world will learn righteousness.

That “learning righteousness” is the product of the great white throne judgment/second death/lake of fire! That is the product of all the judgments of God:

1Co 11:31  For if we would judge ourselves, we should not be judged.
1Co 11:32  But when we are judged, we are chastened of the Lord, that we should not be condemned with the world [to the less desirable great white throne judgment]

In both judgments “we are chastened of the Lord”, but the first judgment has “a crown of life” and “a reward” which is not granted to those who are ruled over by those in the first resurrection to life and to rulership. “The second death/lake of fire” cannot hurt those who are in the first judgment which is the fiery trials which are now on the house of God:

1Pe 4:12  Beloved, think it not strange concerning the fiery trial which is to try you, as though some strange thing happened unto you:
1Pe 4:13  But rejoice, inasmuch as ye are partakers of Christ’s sufferings; that, when his glory shall be revealed, ye may be glad also with exceeding joy.
1Pe 4:14  If ye be reproached for the name of Christ, happy are ye; for the spirit of glory and of God resteth upon you: on their part he is evil spoken of, but on your part he is glorified.
1Pe 4:15  But let none of you suffer as a murderer, or as a thief, or as an evildoer, or as a busybody in other men’s matters.
1Pe 4:16  Yet if any man suffer as a Christian, let him not be ashamed; but let him glorify God on this behalf.
1Pe 4:17  For the time is come that judgment must begin at the house of God: and if it [judgment] first begin at us, what shall the end be of them that obey not the gospel of God?
1Pe 4:18  And if the righteous scarcely be saved, where shall the ungodly and the sinner appear?

The ungodly and sinners will appear at the great white throne judgment to be “chastened of God… condemned with the world” to the great white throne judgment where God’s elect will administer those fiery trials on “the rest of the dead” who were not in the first resurrection at the beginning of the thousand years reign with Christ:

Rev 20:1  And I saw an angel come down from heaven, having the key of the bottomless pit and a great chain in his hand.
Rev 20:2  And he laid hold on the dragon, that old serpent, which is the Devil, and Satan, and bound him a thousand years,
Rev 20:3  And cast him into the bottomless pit, and shut him up, and set a seal upon him, that he should deceive the nations no more, till the thousand years should be fulfilled: and after that he must be loosed a little season.
Rev 20:4  And I saw thrones, and they sat upon them, and judgment was given unto them [who are in the first resurrection]: and I saw the souls of them that were beheaded for the witness of Jesus, and for the word of God, and which had not worshipped the beast, neither his image, neither had received his mark upon their foreheads, or in their hands; and they lived and reigned with Christ a thousand years.
Rev 20:5  But the rest of the dead lived not again until the thousand years were finished. This is the first resurrection.
Rev 20:6  Blessed and holy is he that hath part in the first resurrection: on such the second death hath no power, but they shall be priests of God and of Christ, and shall reign with him a thousand years.

The only people whose names are in the book of life at the white throne judgment will be those who were in the first resurrection a thousand years earlier, and who ruled and reigned with Christ during that thousand years. “The rest of the dead lived not again until the thousand years were finished”. It is ruling with Christ during the thousand years which “is the first resurrection, and that is why we see the phrase “a thousand years” in every verse from verse 2 to verse 6, which clearly distinguishes those in the first resurrection from those who are resurrected at the “second death/lake of fire/ white throne judgment.

Rev 20:11  And I saw a great white throne, and him that sat on it, from whose face the earth and the heaven fled away; and there was found no place for them.
Rev 20:12  And I saw the dead, small and great, stand before God; and the books were opened: and another book was opened, which is the book of life: and the dead were judged out of those things which were written in the books, according to their works.
Rev 20:13  And the sea gave up the dead which were in it; and death and hell delivered up the dead which were in them: and they were judged every man according to their works.
Rev 20:14  And death and hell were cast into the lake of fire. This is the second death.
Rev 20:15  And whosoever was not found written in the book of life [the first resurrection] was cast into the lake of fire [to be judged and purified by that ‘fiery’ judgment’].

We are plainly told who comfortably dwells in and administers that lake of fire, white throne judgment:

Isa 33:14  The sinners in Zion are afraid; fearfulness hath surprised the hypocrites. Who among us shall dwell with the devouring fire? who among us shall dwell with everlasting burnings?
Isa 33:15  He that walketh righteously, and speaketh uprightly; he that despiseth the gain of oppressions, that shaketh his hands from holding of bribes, that stoppeth his ears from hearing of blood, and shutteth his eyes from seeing evil;

So the “fire, trials, tribulation, and torment in brimstone” are all common to all men. But not just “every man” receives a reward while in this life of “mortal flesh”. Those to whom it is given to overcome in this life will be given a crown of life and are promised they will not be hurt of the second death/lake of fire/white throne judgment:

1Co 3:13  Every man’s work shall be made manifest: for the day shall declare it, because it shall be revealed by fire; and the fire shall try every man’s work of what sort it is.
1Co 3:14  If any man’s work [in this age] abide which he hath built thereupon, he shall receive a reward. [“a crown of life… rule and reign with Christ a thousand years… dwell with the devouring fire… with everlasting burnings” as rulers in the lake of fire, purifying the devil and his angels”]
1Co 3:15  If any man’s work shall be burned, he shall suffer loss [of his “crown of life” and of ruling with Christ over all who are not in that “blessed and holy first resurrection”]: but [nevertheless] he himself shall be saved; yet so as by [the] fire” [of the second death/lake of fire/ white throne judgment].

Those who overcome while yet alive in these bodies of mortal flesh, while contending with that rebellious flesh and while being tempted of the devil, “will not be hurt of the second death” and will be given a “crown of life” as a ruler over those who live during the thousand years and all those who are cast into the lake of fire:

Rev 2:10  Fear none of those things which thou shalt suffer: behold, the devil shall cast some of you into prison, that ye may be tried; and ye shall have tribulation ten days: be thou faithful unto death, and I will give thee a crown of life.
Rev 2:11  He that hath an ear, let him hear what the Spirit saith unto the churches; He that overcometh shall not be hurt of the second death.

Remember the devil was cast into the lake of fire/second death/ white throne judgment, and is himself being purified there along with all who followed and believed His lies. It is only those who overcome while in “our bodies of mortal flesh” who can be tempted of the devil and be called by Christ and ‘overcomer’:

2Co 4:10  Always bearing about in the body the dying of the Lord Jesus, that the life also of Jesus might be made manifest in our body.
2Co 4:11  For we which live are alway delivered unto death for Jesus’ sake, that the life also of Jesus might be made manifest in our mortal flesh.

It is manifest that there are no bodies of “mortal flesh” in either resurrection because:

1Co 15:44  It is sown a natural body; it is raised a spiritual body. There is a natural body, and there is a spiritual body.

There are but two resurrections, and in both “it is raised a spiritual body”. There is indeed a natural body, and there is a spiritual body. Only those who overcome the wicked one while in a natural body will be “raised unto life” and rulership with Christ. All others will be “raised unto judgment”, because judgment did not begin with them in this age in a “natural body [of] mortal flesh”. Therefore:

Joh 5:27  And [the Father] hath given him authority to execute judgment also, because he is the Son of man.
Joh 5:28  Marvel not at this: for the hour is coming, in the which all that are in the graves shall hear his voice,
Joh 5:29  And shall come forth; they that have done good, unto the resurrection of life [the first resurrection]; and they that have done evil, unto the resurrection of damnation [Greek: G2920 – krisis, judgment, the great white throne judgment. To be “chastened of the Lord” (1Co 11:31-32), to be “saved, yet by fire” (1Co 3:15), and to “learn righteousness… when [the Lord’s] judgments are in the earth” (Isa 26:9)].

I hope this has given you an understanding of just how all comprehensive is the sacrifice of “our Lord and His Christ”:

Your brother and slave of the Lord, Mike