28:12-19 Job here speaks of wisdom and understanding, the knowing and enjoying of God and ourselves. Its worth is infinitely more than all the riches in this world. It is a gift of the Holy Ghost which cannot be bought with money. Let that which is most precious in God's account, be so in ours. Job asks after it as one that truly desired to find it, and despaired of finding it any where but in God; any way but by Divine revelation.

17. crystal—Or else glass, if then known, very costly. From a root, "to be transparent."

jewels—rather, "vessels."