St Augustine on the Will
I sighed after such freedom, but was bound not by an iron imposed by anyone else but by the iron of my own choice. The enemy had a grip on my will and so made a chain for me to hold me a prisoner. The consequence of a distorted will is passion. By servitude to passion, habit is formed, and habit to which there is no resistance becomes necessity. By these links, as it were, connected one to another (hence my term a chain), a harsh bondage held me under restraint. The new will, which was beginning to be within me a will to serve you freely and to enjoy you, God, the only sure source of pleasure, was not yet strong enough to conquer me older will, which had the strength of old habit. So my two wills, one old, the other new, one carnal, the other spiritual, were in conflict with one another, and their discord robbed my soul of all concentration.
The Confessions, VIII. v (10)
St. Augustine takes up Scriptures and reads