It's the ALLEGORIES!
Tying the OT tales (the precepts) to the NT tales, should be proof enough for the sincere seeker of God's truth. Gal 4:24.
Like how Samson grabbed an entire gate of the city and carried it up the hill, and Jesus said "the gates of hell shall not prevail". Like how Samson pulled down those pillars in Dagon's temple, and the NT says "mighty to the pulling down of strongholds".
Like how Jacob taking a stone for a pillow is like how Jesus is the stone that the builders rejected, but we know Him as the Rock who is the head of the church. Jacob wrestling the angel is like how we wrestle the scriptures; the Word of God.
Like how Gideon armed his men with trumpets, and pitchers with lamps inside, to illustrate the NT spiritual battle when we take the Sword of the Spirit, Eph6:17, and let our light shine after becoming ‘broken vessels'.
Like how the sinner Rahab hiding of the 2 spies led to her being "saved", Josh6:25, because "thy Word have I hid in mine heart" and the Word is the dual-natured Jesus of John 10:30.
Like how Joseph in Egypt is a type of Jesus (do the analogies), and how Samuel is a type of the Holy Ghost, and David's battle with Goliath teaches us concerning the NT Armor of God.
AFTER you've studied all these and more (the metaphors, the numbers, the genealogies, the meaning of names, figures of speech, drinking gold-dust, etc.), proceed to learn how the 39 books of the OT and the 27 books of the NT is no accident. He really does "watch over his WORD to perform it".
Some readers will have more to add -- these are by no means the last of the allegories...