'The bulk of professed Christians are used to speak of man as of a being, who naturally pure, and inclined to all virtue, is sometimes, almost involuntarily, drawn out of the right course, or is overpowered by the violence of temptation. Vice with them is rather an accidental and temporary, than a constitutional and habitual distemper; a noxious plant, which though found to live and ever thrive in the human mind, is not the natural growth and production of the soil.
Far different is the humiliating language of Christainity. From it we learn that man is an apostate creature, fallen from his high original, degraded in his nature, and depraved in his faculties; indisposed to good and disposed to evil; prone to vice, it is natural and easy to him; disinclined to virtue, it is difficult and laborious; that he is tainted with sin, not slightly and superficially, but radically and to the very core.'
William Wilberforce, A Practical View of Christianity, p.14.