before confession
Be truly sorry for your sins.
“The essential act of Penance, on the part of the penitent, is contrition, a clear and decisive rejection of the sin committed, together with a resolution not to commit it again, out of the love one has for God and which is reborn with repentance. Understood in this way, contrition is therefore, the beginning and the heart of conversion, of that evangelical metánoia that brings the person back to God like the Prodigal Son returning to his father, and which has in the sacrament of Penance its visible sign and which perfects attrition.”*
The resolution to avoid committing these sins in the future (amendment) is a sure sign that your sorrow is genuine and authentic.
This does not mean that a promise never to fall again into sin is necessary. A resolution to try to avoid the near occasions of sin suffices for true repentance. God’s grace in cooperation with the intention to rectify your life will give you the strength to resist and overcome temptation in the future.
Act of Contrition
O my God, I am heartily sorry for having offended you and I detest all my sins, because I dread the loss of heaven and the pains of hell; but most of all because they offend you, my God, who are all good and deserving of all my love. I firmly resolve with the help of your grace, to confess my sins, to do penance, and to amend my life. Amen.
or any other like: I confess . . .
You may now go to Confession