By Peter Kwasniewski, LifeSiteNews - Catholics are encouraged to prepare themselves for the Sacrament of Penance by prayerfully reviewing an examination of conscience. A multitude of formats for such examinations can be found. Most commonly they are based on the Ten Commandments, but sometimes one will find reference to the Beatitudes, the corporal and spiritual works of mercy, the virtues and vices, or categories of people.