We must now consider the subjective parts of temperance: first, those which are about pleasures of food; secondly, those which are about pleasures of sex.
The first consideration will include abstinence, which is about meat and drink, and sobriety, which is specifically about drink.
With regard to abstinence three points have to be considered: (1) Abstinence itself; (2) its act which is fasting; (3) its opposite vice which is gluttony.
Under the first head there are two points of inquiry:
A Whether abstinence is a virtue?
A Whether it is a special virtue?