Albert Barnes Commentary Jeremiah 9:24

"but let him that glorieth glory in this, that he hath understanding, and knoweth me, that I am Jehovah who exerciseth lovingkindness, justice, and righteousness, in the earth: for in these things I delight, saith Jehovah." — Jeremiah 9:24 (ASV)

This is the prophet’s remedy for the healing of the nation. It is the true understanding and knowledge of God; the first of which means the spiritual enlightenment of the mind (1 Corinthians 2:13–14), and the other, the training of the heart to obedience (John 8:31–32). This knowledge of God is further said to reveal in Him three chief attributes:

1. “lovingkindness,” that is, readiness to show grace and mercy;
2. “judgment,” a belief in which is declared in Hebrews 11:6 to be essential to faith;
3. “righteousness,” which is essential to religion absolutely.

Unless people believe that God’s dealings with them in life and death are right and just, they can neither love nor reverence him.