Musar su Ecclesiaste 9:17

The angry man cannot be very wise, for wrath causes reason to flee from the mind, so that he cannot answer as is proper, and he cannot rebuke as is proper, and all his words are not prompted by intelligence. The angry man bars from himself all corrections and rebukes, for no man feels free to reveal his errors and his shortcomings, inasmuch as every man fears him, — fears to tell him the things he does wrong, lest he be wrathful with him. And even if some person should rebuke him, the angry man will not receive correction because of his anger. In general then, an angry man does not acquire any good quality unless he first removes his anger from his heart. Just as the angry man does not accept rebuke from others, so is he not able to administer rebuke to others, for the Torah has said, "You shall surely rebuke your neighbor, and thus not bear sin because of his wrongful conduct" (Leviticus 19:17), which means that first you must rebuke him gently, and in private, and with soft speech, pleading with him that you are thinking only of his own good. And then, if you do this, sin will not accrue to you. But if you rebuke your companion right at the beginning, with an angry voice and with wrath, and you shame him, then you are sinning for your companion will not receive correction from you. For this is human nature, if a man comes to his companion with force then his companion will be stubborn and unyielding to him, and will not listen to him. Concerning this the wise man said in Koheleth, "The words of the wise are heard gently" (Eccl. 9:17), that is to say, the wise man speaks gently.

In one's speaking: our sages, of blessed memory, said: "one should always speak with other people in a gentle manner" (Yomah 86a). This is stated explicitly in scripture: "the words of the wise are heeded [when spoken] gently" (Kohelet 9:17). One's words should be of honoring [others] not of belittling them. Likewise scripture says: "he who belittles his fellow lacks sense" (Mishlei 11:12), and "when the wicked comes, there also comes contempt" (Mishlei 18:3).

And when a man contemplates further on his obligation to G-d, blessed be He, and to what extent it is neglected by him and how much he is lax in it, certainly he will feel shame and not arrogance, humiliation and not elevation of heart. Likewise scripture says: "I have indeed heard Ephraim grieving... for after my repentance I have regretted; and after I realized, I smote my thigh; I felt ashamed and disgraced" (Yirmiyahu 31:17-18).