We must now consider the distinction of things in particular; and firstly the distinction of good and evil; and then the distinction of the spiritual and corporeal creatures.
Concerning the first, we inquire into evil and its cause.
Concerning evil, six points are to be considered:
A Whether evil is a nature?
A Whether evil is found in things?
A Whether good is the subject of evil?
A Whether evil totally corrupts good?
A The division of evil into pain and fault.
A Whether pain, or fault, has more the nature of evil?