We must next consider chastity: (1) The virtue itself of chastity: (2) virginity, which is a part of chastity: (3) lust, which is the contrary vice. Under the first head there are four points of inquiry:

(1) Whether chastity is a virtue?

(2) Whether it is a general virtue?

(3) Whether it is a virtue distinct from abstinence?

(4) Of its relation to purity.