Whether abstinence is a virtue?

Objections

Objection 1 : It seems that abstinence is not a virtue. For the Apostle says (1 Cor. 4:20): "The kingdom of God is not in speech but in power [virtute]." Now the kingdom of God does not consist in abstinence, for the Apostle says (Rm. 14:17): "The kingdom of God is not meat and drink," where a gloss [*Cf. St. Augustine, Questions. Evang. ii, qu. 11] observes that "justice consists neither in abstaining nor in eating." Therefore abstinence is not a virtue.
Objection 2 : Further, Augustine says (Confess. x, 11) addressing himself to God: "This hast Thou taught me, that I should set myself to take food as physic." Now it belongs not to virtue, but to the medical art to regulate medicine. Therefore, in like manner, to regulate one's food, which belongs to abstinence, is an act not of virtue but of art.
Objection 3 : Further, every virtue "observes the mean," as stated in Ethic. ii, 6,7. But abstinence seemingly inclines not to the mean but to deficiency, since it denotes retrenchment. Therefore abstinence is not a virtue.
Objection 4 : Further, no virtue excludes another virtue. But abstinence excludes patience: for Gregory says (Pastor. iii, 19) that "impatience not unfrequently dislodges the abstainer's mind from its peaceful seclusion." Likewise he says (Pastor. iii, 19) that "sometimes the sin of pride pierces the thoughts of the abstainer," so that abstinence excludes humility. Therefore abstinence is not a virtue.