Jn 8, 21-30
He said to them again, "I am going away and you will look for me, but you will die in your sin. Where I am going you cannot come.” So the Jews said, "He is not going to kill himself, is he, because he said, 'Where I am going you cannot come’?"
He said to them, "You belong to what is below, I belong to what is above. You belong to this world, but I do not belong to this world. That is why I told you that you will die in your sins. For if you do not believe that I AM, you will die in your sins.” So they said to him, "Who are you?”
Jesus said to them, "What I told you from the beginning. I have much to say about you in condemnation. But the one who sent me is true, and what I heard from him I tell the world."They did not realize that he was speaking to them of the Father. So Jesus said (to them), "When you lift up the Son of Man, then you will realize that I AM, and that I do nothing on my own, but I say only what the Father taught me. The one who sent me is with me. He has not left me alone, because I always do what is pleasing to him.” Because he spoke this way, many came to believe in him.
But we have Baptism, which reconciles us with God; why then do we need a special sacrament of Reconciliation?
Baptism does snatch us from the power of sin and death and brings us into the new life of the children of God, but it does not free us from human weakness and the inclination to sin. That is why we need a place where we can be reconciled with God again and again. That place is confession. (1425–1426)
It does not seem like a modern thing to go to confession; it can be difficult and may cost a great deal of effort at first. But it is one of the greatest graces that we can receive again and again in our life—it truly renews the soul, completely unburdens it, leaving it without the debts of the past, accepted in love, and equipped with new strength. God is merciful, and he desires nothing more earnestly than for us, too, to lay claim to his mercy. Someone who has gone to confession turns a clean, new page in the book of his life.