Musar su Deuteronomio 31:15

The ninth principle is the destruction of lust. He must lay it to his heart that lust ruins all deeds. And he should abstain from luxuries, even from things which are permitted to him. And he should conduct himself in the paths of abstinence, eating only to satisfy his hunger and to preserve his body. And the same is true in his relationship to woman. For whenever a man follows after lust he is drawn after the functions of the body and separates himself from the ways of the cultured soul. Then his evil inclination overpowers him, as it is written, "But Jeshurun waxed fat, and kicked" (Deut, 31:15). And it is written, "Lest I be full, and deny, and say : 'Who is the Lord?' " (Prov. 30:9). Now the lust that is given into the heart of a man is the root of all deeds. Therefore he must hurry to correct that lust, and on this subject we have dwelt above. And there is a great benefit in the breaking of lust, for in this way a man reveals that his heart is good and upright, and that he rejects the character which sin has caused him to have. And one who abstains even from what is permitted erects a great fence which will keep him from touching what is forbidden. It is as if he says, "Even in that which is permitted I do not satisfy my craving; how then shall I stretch forth my hands to that which is forbidden?"