"How priceless is your unfailing love, O God! People take refuge in the shadow of your wings." (Psalm 36:7)
Psalm 36 is one of the structurally distinctive psalms: it moves from a description of the wicked person to a meditation on the character of God, and the contrast between the two is the theological point. The wicked person has an oracle of transgression in their heart: there is no fear of God before their eyes. They flatter themselves so much that they cannot detect or hate their own sin. Their words are wicked and deceitful; they have ceased to be wise or do good. Even in the night they plot evil and do not reject what is wrong.
This portrait of the person without the fear of God is important for the Catechism's teaching on conscience: the conscience that has been repeatedly overridden by self-flattery becomes incapable of discernment (CCC 1791). The process is gradual but the endpoint is the person described in Psalm 36: unable to see their own wickedness because they have arranged their inner life so that nothing challenges them.
Against this portrait the psalmist places the character of God, and the contrast is overwhelming. The Lord's unfailing love reaches to the heavens, his faithfulness to the skies, his righteousness like the highest mountains, his justice like the great deep. How priceless is your unfailing love, O God! People take refuge in the shadow of your wings. The exhaustiveness of the wicked person's corruption finds its counter in the inexhaustibility of God's goodness. Where human character reaches its limit, divine character exceeds all measure.
The most profound verse of the psalm is tucked in the middle: For with you is the fountain of life; in your light we see light. God is not merely the giver of life. He is the fountain from which all life flows. He is not merely a source of truth. He is the light by which all truth is seen. The Catechism identifies this verse with the Trinitarian nature of God: the Father is the fountain, the Son is the light, and it is by the light of the Son that we see the Father's light (CCC 234).
Brothers and sisters, the contrast of Psalm 36 is a diagnostic tool: which of the two portraits more accurately describes the direction of your interior life? The person who has arranged their inner world to avoid the fear of God and cannot detect their own sin, or the person who takes refuge in the shadow of God's wings and drinks from the fountain of life? The movement from one to the other is always available. It begins with the fear of the Lord.
Lord God, your unfailing love reaches to the heavens and your faithfulness to the skies. With you is the fountain of life; in your light we see light. Let us take refuge in the shadow of your wings and drink from your river of delights. Keep us from the self-flattery that cannot see its own sin. Through Christ our Lord. Amen.