"A God merciful and gracious"
The divine name, "I Am" or "He Is", expresses God's faithfulness: despite the faithlessness of men's sin and the punishment it deserves, he keeps "steadfast love for thousands". By going so far as to give up his own Son for us, God reveals that he is "rich in mercy". By giving his life to free us from sin, Jesus reveals that he himself bears the divine name: "When you have lifted up the Son of man, then you will realize that "I AM"."
Source: Catechism of the Catholic Church (Vatican.va)