105 All people must take great care not to allow themselves to be tainted by the attitude of the Pharisee, which would seek to eliminate awareness of one's own limits and of one's own sin. In our own day this attitude is expressed particularly in the attempt to adapt the moral norm to one's own capacities and personal interests, and even in the rejection of the very idea of a norm. Accepting, on the other hand, the "disproportion" between the law and human ability (that is, the capacity of the moral forces of man left to himself) kindles the desire for grace and prepares one to receive it. "Who will deliver me from this body of death?" asks the Apostle Paul. And in an outburst of joy and gratitude he replies: "Thanks be to God through Jesus Christ our Lord! " ( Rom 7:24-25). We find the same awareness in the following prayer of Saint Ambrose of Milan: "What then is man, if you do not visit him? Remember, Lord, that you have made me as one who is weak, that you formed me from dust. How can I stand, if you do not constantly look upon me, to strengthen this clay, so that my strength may proceed from your face? When you hide your face, all grows weak ( Ps 104:29): if you turn to look at me, woe is me! You have nothing to see in me but the stain of my crimes; there is no gain either in being abandoned or in being seen, because when we are seen, we offend you. Still, we can imagine that God does not reject those he sees, because he purifies those upon whom he gazes. Before him burns a fire capable of consuming our guilt (cf. Joel 2:3)".
Source: Veritatis Splendor (Vatican.va)