Albert Barnes Commentary Job 12:13

"With [God] is wisdom and might; He hath counsel and understanding." — Job 12:13 (ASV)

With him is wisdom—Margin, correctly, “God.” However much wisdom there may seem to be with aged men, yes, the true wisdom—that which was supreme and worthy of the name—was to be found in God alone. Job’s object was to lead their thoughts to God and to bring his friends to contemplate the wisdom He manifests in His works. Accordingly, Job goes on in the remainder of this chapter to state some illustrations of the wisdom and power God had exhibited. He particularly aimed to show that God was a sovereign and did His pleasure everywhere.

God made all things; He sustains all things; He reverses the condition of people at His pleasure; He sets up whom He pleases, and when He chooses, He casts them down. His works are, in many respects, contrary to what we should anticipate. The sense of all this is that God was a holy and righteous sovereign. Furthermore, such were the reverses under His administration that we could not argue He treated all according to their character on earth.