Musar su Proverbi 11:17

Cruelty is the opposite of Mercy as it is written: "They are cruel and have no compassion" (Jer. 50:42). And this trait of cruelty is not found in righteous people but in the souls of the wicked as it is written: "The tender mercies of the wicked are cruel" (Prov. 12:10). This quality is also found in the impudent as it is written: "An impudent nation that shall have no regard for the person of the old and show no mercy to the young" (Deut. 28:50). And you already know the evil of the trait of impudence. Go forth and learn the evil nature and the punishment of cruelty, for in the matter of the reward of a wicked man — rebellious and disobedient — it is said: "A rebellious man seeks only evil, therefore, a cruel messenger shall be sent against him" (Prov. 12:11). Every cruel person has no quality of kindness in his make up, even towards himself, as it is written: "The merciful man does kindness to his own soul, but he that is cruel troubles his own flesh" (Ibid. 11:17).

And Hillel would apply the verse: "'the pious man does good to his own soul' (Mishlei 11) to eating the morning meal. He would also wash his face and hands in honor of his Maker, inferring from the practice of washing the statues of kings" (Vayikra Rabba 34).

I refer to all that has been written about this in the Talmud and the commentaries of the Tosafot on Taanit 11a and I will add my own comments. The discussion commences with Samuel stating that anyone who observes Fast-Days [that have not been proclaimed] is guilty of a misdemeanor. He agrees with Rabbi Eliezer Hakappor who interpreted our verse above as demonstrating that denying oneself the use of wine is sinful. Samuel argued, that if merely denying oneself wine is sinful, then surely it must be even more sinful to deny oneself food and drink altogether! Rabbi Eleazar countered that on the contrary, anyone imposing fasts upon himself is called "holy." He quotes from our section of the Torah (6,5) קדוש יהיה גדל פרע שער ראשו, "holy shall be he who allows his hair to grow wild on his head." His argument runs as follows: "If a person who merely abstains from wine is called "holy" by the Torah, surely a person who denies himself other pleasures such as food and drink must be considered "holy!" The Talmud asks: "How can Samuel refute the argument of Rabbi Eleazar?" Samuel responds by saying that the Torah calls the person who allows his hair to grow wild "holy". The term "holy," does not, however, apply to someone who vowed not to drink wine. To this Rabbi Eleazar responds that the only one who is called "sinner," i.e. in need of atonement, is the Nazirite who defiled himself during the currency of his vow, seeing that he was not allowed to become impure. The Talmud goes on to ask if Rabbi Eleazar is consistent in his viewpoint, seeing he is on record as saying that a person ought to conduct himself at all times as if something sacred resided within him, and he must not harm such sacred material, since the prophet Hoseah 11,9, states: "Something holy is in your midst, and I will not come into the city!" This surely means that a person must not fast voluntarily! The Talmud answers that this is really not a contradiction within the views expressed by Rabbi Eleazar. In the case where a person knows that the fast does not harm his health, he is allowed to fast. When he has reason to believe that the fast is harmful to him, he must not fast. Rabbi Shimon ben Lakish describes the person who imposes Fast-Days upon himself as "pious" rather than as "holy."