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:

A1 Whether chastity is a virtue?

A2 Whether it is a general virtue?

A3 Whether it is a virtue distinct from abstinence?

A4 Of its relation to purity.