We must now consider the cause of sin, on the part of the sensitive appetite, as to whether a passion of the soul may be a cause of sin: and under this head there are eight points of inquiry:

A[1] Whether a passion of the sensitive appetite can move or incline the will?

A[2] Whether it can overcome the reason against the latter's knowledge?

A[3] Whether a sin resulting from a passion is a sin of weakness?

A[4] Whether the passion of self-love is the cause of every sin?

A[5] Of three causes mentioned in 1 Jn. 2:16: "Concupiscence of the eyes, Concupiscence of the flesh," and "Pride of life."

A[6] Whether the passion which causes a sin diminishes it?

A[7] Whether passion excuses from sin altogether?

A[8] Whether a sin committed through passion can be mortal?