:2 My son, if thou wilt receive My words, and hide My commandments with thee:
See the little word if? We are given a choice. It would have been so much easier for US if God didn't give us free will. But He wanted us to CHOOSE to follow Him.
:5 Then shalt thou understand the fear of the Lord, and find the knowledge of God.
Verses 1-4 give us what to do if we want verse 5.
There are more verses that say what we get for doing what God commands.
:1 The heavens declare the glory of God: and the firmament sheweth forth his handiwork.
:14 Let the words of my mouth and the meditation of my heart, be acceptable in Thy sight, O Lord, my strength and my redeemer.
1 Sam 19
Verse 1 has Saul asking Jonathan and his servants to kill David.
:2-6 Jonathan tells David and tells him to hide. Then he speaks to Saul on David's behalf. Saul swears he won't kill David.
:7-10 David goes to war with the Philistines again. Saul tries to kill David again.
:11 Michal warns David
:12-17 Michal helps David escape and then tricks Saul's men. When he finds out he is upset with her.
:18-20 David goes to Samuel and tells him what is happening. When Saul sends messengers to take David, they begin to prophesy instead.
:21-24 Every time he sends more men they do the same thing. Finally he goes himself and ends up prophesying and stripped.