Be truly sorry.
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, which is reborn with repentance. The resolution to avoid committing these sins in the future 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.
First examine your conscience well, then tell the priest the specific kind of sins you have committed and, to the best of your ability, how many times you have committed them since your last good confession. You are obliged to confess only mortal sins, since you can obtain forgiveness for your venial sins by sacrifices and acts of charity. If you are in doubt about whether a sin is mortal or venial, mention your doubt to the confessor. Remember also, confession of venial sins is very helpful for avoiding sin and advancing toward Heaven.
Choose an examination of conscience below.
Prayer Before Confession
O Lord, grant me light to see myself as Thou dost see me, and the grace to be truly and effectively sorry for my sins. O Mary, help me to make a good confession.
Prayer for a Good Confession
O my God, by my grievous sins I have crucified again Thy Divine Son and made Him a mockery. For this I have deserved Thy wrath and made myself fit for the fires of hell. How ungrateful have I been to Thee as well, my heavenly Father, Who created me out of nothing, redeemed me by the precious Blood of Thy Son and sanctified me by Thy holy sacraments and by the Holy Ghost. But Thou hast spared me by Thy mercy, to make this confession. Receive me back as Thy prodigal son and grant me to confess well, that I may begin anew to love Thee with my whole heart and soul, and henceforth to keep Thy commandments and suffer patiently whatever temporal punishment may remain. I hope by Thy goodness and power to obtain everlasting life in Paradise. I ask this through Jesus Christ, Our Lord.
Act of Contrition
O my God, I am heartily sorry for having offended Thee. 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 Thee, 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.
Prayer of Thanksgiving for After Confession
Merciful Lord, with a pure heart I thank you for taking away my sins. Let your Holy Spirit guide my life so that my soul may bear the fruit of love, joy, peace, patience, kindness, goodness, trustfulness, gentleness, and self-control. Renew my desire to be your faithful friend and servant, increase my loving dependence on you, and grant me that joy and peace of heart which comes from doing your holy will. Through Christ our Lord. Amen.