Thou Shalt Not Overeat
Most religions have strong injunctions against gluttony.
Catholic doctrine urges temperance as a way of respecting one's body and to "moderate attachment to this world's goods." According to the Catechism, "The virtue of temperance disposes us to avoid every kind of excess: the abuse of food, alcohol, tobacco, or medicine." Gluttony is seen as the opposite of self-restraint and living uprightly, as both the New and Old Testaments show. The Bible cautions: "Do not follow your base desires, but restrain your appetites (Sirach 18:30)" and "live sober, upright, and godly lives in this world (Titus 2:12)."
Catholicism teaches that gluttony is a sin when excessive eating or drinking impairs one's health or mental capacities. In most cases, gluttony is considered a pardonable sin, but there are people for whom, as St. Paul wrote, their "god is in their belly" (Phil. 3;19), and this constant overindulgence, and especially impairment because of it, would be a mortal sin. In Summa Theologica, St. ThomasAquinas wrote
that gluttony is indeed a sin, but it is not the greatest of sins.
Christianity: Eastern Orthodox
Orthodox Christianityemphasizes self-control
in humans, and restraint in eating is seen as one of the foremost indications of self-control. Gluttony is considered a capital, or mortal, sin. The consensus of the early church is "stop eating while you are still hungry and don't allow your stomach to be filled to satisfaction," according to the 4th-century saint John Cassian. Overeating is associated with the dulling of intelligence and a decreased ability to guard against temptations. Orthodox Christians believe that, as humans fell initially through eating (when Adam and Eve took the apple in the Garden of Eden), people must have a proper relationship with food to restore themselves to union with God. Orthodox Christians also abstain from certain foods during fast periods to gain strength in self-control.