Piper on Psalm 119:
The reason Psalm 119 has 176 verses is that the Hebrew alphabet has 22 letters. The psalmist exults in the multifaceted preciousness of God’s word by taking each letter of the alphabet and writing eight verses of exultation, each verse beginning with that letter. It’s like saying: “The word of God is precious in every way from A to Z—beyond perfection.” (Eight is one more than seven, the number of completeness and perfection.)
Piper proceeds to unpack treasure from verses 65-72:
65: Good (tov) you did, Yahweh, with your servant according to your word.
66: Good (tov) discernment and knowledge, teach me, because in your commandments I trust.
67: Before I was afflicted I erred, but now I keep your word.
68: Good (tov) you are and you cause good to happen, teach me your statutes.
69: Smear upon me lies, so do the proud, but I with all my heart watch your precepts.
70: Gross like fat is their heart, I delight in your instruction.
71: Good for me (tov li) it was that I was afflicted, so that I might learn your statutes.
72: Good for me (tov li) the instruction of your mouth, more than thousands of gold and silver pieces.
Read the whole thing.