"The purposes of a person's heart are deep waters, but one who has insight draws them out." (Proverbs 20:5)
Wine is a mocker and beer a brawler; whoever is led astray by them is not wise. A king's wrath strikes terror like the roar of a lion; those who anger him forfeit their lives. It is to one's honour to avoid strife, but every fool is quick to quarrel. The purposes of a person's heart are deep waters, but one who has insight draws them out. Many claim to have unfailing love, but a faithful person who can find? The righteous lead blameless lives; blessed are their children after them. Who can say: I have kept my heart pure; I am clean and without sin? Do not say: I'll pay you back for this wrong. Wait for the LORD, and he will avenge you. Differing weights are an abomination to the LORD; dishonest scales are not good.
The Catechism draws from this proverb the principle of self-knowledge as a prerequisite of wisdom: the insightful person who can draw out the deep purposes of their own heart has achieved the self-understanding that moral growth requires (CCC 1779).
Brothers and sisters, the purposes of a person's heart are deep waters. Your own motivations are not immediately transparent even to yourself. The person of insight draws them out through prayer, examination of conscience, and honest conversation with a spiritual director. Know your own depths before you speak and act from them.
Lord God, draw out the deep purposes of our hearts and show them to us. Where they are good, confirm them. Where they are corrupt, cleanse them. Through Christ our Lord. Amen.