The Catholic Church historically observes the disciplines of fasting and abstinence at various times each year. For Catholics, fasting is the reduction of one's intake of food, while abstinence refers to refraining from something that is good, and not inherently sinful, such as meat. The Catholic Church teaches that all people are obliged by God to perform some penance for their sins, and that these acts of penance are both personal and corporeal. Bodily fasting is meaningless unless it is joined with a spiritual avoidance of sin. Basil of Caesarea gives the following exhortation regarding fasting...