Sidetracked in the Wilderness by Michael Wells

This is a book that has been very challenging with regard to understanding the origin of sin in ones life. The old man and the new man. Is the sin in our lives a result of the old man in us now, or the result of the residue left over from the old man in our lives? Is the old man presently alive in the soul of man or are the remnants of the old man still in our members?