For there are three points, as you know, which the catholic Church chiefly maintains against them [the Pelagians].
One of these is, that the grace of God is not given according to our merits; because even every one of the merits of the righteous is God's gift, and is conferred by God's grace.
The second is, that no one lives in this corruptible body, however righteous he may be, without sins of some kind.
The third is, that man is born obnoxious to the first man's sin, and bound by the chain of condemnation, unless the guilt which is contracted by generation be loosed by regeneration. -- St. Augustine, *On Predestination of the Saints* Book II:4