“Some will say that it’s the physical act that is sinful… Jesus corrected those who thought just that when he expounded the fact that adultery began in the heart and even imagined lustful acts were as bad as doing them physically. Sin is an affliction of the soul. Thus the fact remains that it is borne out in the thoughts and in the desires of the heart.”
(Fr. Benedict of Ascension Monastery in Resaca, GA)