What we are to do if we are to be

In both

(1) our cognitive endeavor to come to know who we are and

what we are to do if we are to be fully the beings we are meant to be and

(2) our conative effort to do what we come to know we ought to do

if we are to be fully the beings we are meant to be,

we can be both crippled or disabled and helped or enabled.

Sin – original, personal, social – is, as we shall see, the great disabling factor in these endeavors.

(William E. May, Introduction to Moral Theology)