The Sacrament of Penance is God's gift to us so that any sin committed after Baptism can be forgiven.
To receive the sacrament of Penance worthily, we must:
Oh 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 I have offended You, My God,
Who art all-good and deserving of all my love.
I firmly resolve, with the help of Thy grace,
To confess my sins, to do penance,
And to amend my life.
Amen.