אַל־תִּֽהְי֤וּ ׀ כְּס֥וּס כְּפֶרֶד֮ אֵ֤ין הָ֫בִ֥ין בְּמֶֽתֶג־וָרֶ֣סֶן עֶדְי֣וֹ לִבְל֑וֹם בַּ֝֗ל קְרֹ֣ב אֵלֶֽיךָ׃
Ne soyez pas comme le cheval, comme le mulet, auxquels manque l’intelligence, qu’il faut retenir par les rênes et le mors, leur parure qu’ils rongent pour qu’ils ne s’approchent pas de toi.
Sha'arei Teshuvah
Now we will explain the principles of repentance. The first principle is regret: His heart should understand that leaving God is bad and bitter; and he should place into his heart that there is punishment, vengeance and repayment for iniquity, as it is stated (Deuteronomy 32:35), "To be My vengeance and repayment." And it is stated (Job 19:29), "Be in fear of the sword, for [your] fury is iniquity worthy of the sword." And he should regret his bad deeds and say in his heart, "What have I done? How did I not have fear of God in front of my eyes, and did not become afraid from the rebukes of iniquity and from the harsh judgments? For there are many aches [waiting] for the evildoer. I did not pity my body; and for a moment of pleasure, my eyes did not pity its being destroyed. I became like a man who robs and extorts, eats and is satiated; but who knows that after his eating and his drinking, the judge will grind his teeth with gravel - like the matter that is stated (Proverbs 20:17), 'but later his mouth will be filled with gravel.' And worse than this, I was cruel to the dear soul and I rendered it impure with the idols of my impulse. And what did it gain from all of its acquisitions, if they are bad in the eyes of its Master? And how did I trade a passing world for a world that exists for ever and ever? How have I become similar to animals? As I have gone after my impulse like a horse, like a mule that does not understand. And I have strayed from the way of the intellect. And behold the Creator blew a living soul into my nose - a wise heart and the benefit of intellect - in order to recognize Him and fear Him and to govern over the body and all of its actions, like it governs over the other animals that do not speak, because it is precious in His eyes. And though I was created like this, it has become the opposite of this in me. Why am I alive? It is like the matter that is stated (Proverbs 21:16), 'A man who strays from the path of the intellect will rest in the company of ghosts.' Moreover I have not [even] fulfilled the precept of the animal. Rather I have been lower than that. For the ox knows its master and the donkey the trough of its owner; whereas I have not known and not reflected. And I have sent my soul to be free from its master. So I have tasted my nectar, but forgotten my end. And I have stolen and extorted and trampled upon the indigent. I have not remembered the day of death, upon which nothing will remain before my soul besides my corpse and my dirt." And this matter that we have explained is that which Jeremiah, peace be upon him, had spoken, "No one regrets his wickedness and says, 'What have I done?'"
Iggeret HaGra
I reiterate my request that you guide your sons and daughters with words of kindness and Mussar that will find a place in their heart. This is true especially if we merit to arrive in Eretz Yisrael, because one must be extra cautious to follow Hashem's ways there. Therefore, train them well, since one must work hard on one's speech and character traits, and only through good habits can we control ourselves (Shaarey Teshuvah). All beginnings are hard (Mechilta Yisro). But afterwards, one is worthy of praise (Mishlei 20:14). For the wicked person knows that he is taking the wrong path, but it is hard for him to change. But this is man's main task, not to go after his desires, but (Tehillim 32:9) "to restrain himself with a bit and bridle when he is being groomed." Man must deprive himself until he dies, not by fasting or asceticism, but by controlling his mouth and desires. This is teshuvah. And this is the whole reward of the World-to-Come, as it is written (Mishlei 6:23): "For the commandment is a lamp and the Torah is a light" - but "the way to life is the rebuke that disciplines." And that is worth more than any amount of fasting and self-affliction! For every second that man controls his tongue, he merits some of the "hidden [by Hashem for the righteous] light," something which no angel or [other] creature can imagine (Midrash). And it is stated (Tehillim 34:13,14): "Who is the man who desires life, and loves days that he may see good? Guard your tongue from evil, and your lips from speaking deceitfully." This will atone for any sin and save one from Gehinnom, as we find (Mishlei 21:23): "He who guards his mouth [from too much eating and drinking] and tongue [from idle words] guards himself from trouble." Also (ib. 18:21): "Death and life are in the power of the tongue." Woe to one who gives away his life for one word! Then what advantage is there to one who has a tongue (see Koheles 10:11)? And, "Everything has a cure except, etc." It is most important to refrain from speaking words of praise about anyone. How much more so does this apply to speaking ill of anyone! Why must one speak about others? "The mouth that speaks strangely is a deep pit; he who angers Hashem falls into it" (Mishlei 22:14).