'Let us open our eyes, dearest brother, for we have two wills -- one of the senses, which seeks the things of sense, and the other the self-will of the spirit, which, under aspect and colour of virtue, holds firm to its own way. And this is clear when it wants to choose places and seasons and consolations to suit itself, and says: "Thus I wish in order to possess God more fully." This is a great cheat, and an illusion of the devil; for not being able to deceive the servants of God through their first will -- since the servants of God have already mortified it so far as the things of sense go -- the devil catches their second will on the sly with things of the spirit.'
St. Catherine of Siena
