We now consider the action of the angels on man, and inquire: (1) How far they can change them by their own natural power; (2) How they are sent by God to the ministry of men; (3) How they guard and protect men.

Under the first head there are four points of inquiry:

A[1] Whether an angel can enlighten the human intellect?

A[2] Whether he can change man's will?

A[3] Whether he can change man's imagination?

A[4] Whether he can change man's senses?