In the gospels, Jesus affirmed the commandment against adultery[17] and seemed to extend it, saying, "But I say to you, anyone who looks on a woman to lust after her has committed adultery with her already in his heart."[18] He taught his audience that the outward act of adultery does not happen apart from sins of the heart
The bondage of the human heart that keeps it from coming to Christ is not that light is lacking, but that darkness is loved,...
So faith comes from hearing, and hearing through the word of Christ.
''And when you fast, do not look gloomy like the hypocrites, for they disfigure their faces that their fasting may be seen by others....