Good Christians make an examination of conscience and an act of contrition every evening. There was a devout monk lying at the point of death; when his Superior came and told him to make his confession, he answered: "Blessed be God! I have for thirty years made an examination of conscience every evening, and have made my confession every day as if I were at the point of death."
- St. Alphonsus Maria de Liguori
 

In the life of the body a man is sometimes sick, and unless he takes medicine, he will die. Even so in the spiritual life a man is sick on account of sin. For that reason he needs medicine so that he may be restored to health; and this grace is bestowed in the Sacrament of Penance.
-St. Thomas Aquinas