Martha wrote:

I UNDERSTAND!!
David had five stones (grace and faith) When David killed Goliath with a stone (one- Unity with God), then he could kill him again with the sword (word of God).
David slew his beast. Goliath was his own giant beast!
David was the 7th (complete) son that became the 8th (new man) son. (type and shadow of Christ).
Thanks,
Martha

Thank you Martha,
I think that it is no mistake that we are told that David killed Goliath with both a single one of five stones of grace and faith, and also with the sword of God’s word. They really do work together to get the job done.

1Sa 17:50 So David prevailed over the Philistine with a sling and with a stone, and smote the Philistine, and slew him; but there was no sword in the hand of David.
1Sa 17:51 Therefore David ran, and stood upon the Philistine, and took his sword, and drew it out of the sheath thereof, and slew him, and cut off his head therewith…

Mike