Fyi, this is from Fr Marin (in his work “The Theology of Christian Perfection”) (the work has the imprimatur):
Gluttony
The sense of taste can constitute an obstacle to perfection by reason of its immoderate inclination to eat and drink. Lack of mortification in this sense is called gluttony. According to St. Thomas, gluttony is the disordered appetite for food and drink,15 one of the vices opposed to the cardinal virtue of temperance. God placed in nourishment a pleasure which has for its purpose the guarantee of the nutritive function for the conservation of the life of the individual. In itself, to experience that pleasure does not imply any imperfection, and not to experience it would be a physiological deformity. But since original sin, the concupiscible appetite has been withdrawn from the control of reason and tends to exceed the limits of reason. Then this sensation becomes sinful, because the nature of man is rational and that which goes contrary to reason is evil for human nature and is contrary to the will of God.
Moderation of the sense of taste offers a special difficulty, since we cannot prescind entirely from it. On the one hand, it is necessary to nourish ourselves in order to preserve life; on the other hand, it is necessary to keep oneself within the limits of reason, without permitting the natural delight to become the primary purpose of eating.
According to St. Gregory and St. Thomas,16 one can incur the vice of gluttony in the following ways: eating outside the proper time and without necessity; eating with too great an avidity; seeking exquisite fare; preparing food with excessive delicacy; eating too much in quantity.
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