Yehudah ben Tema dice: Sii audace come un leopardo, [... e non vergognarti di chiedere al tuo rabbino ciò che non hai capito, come abbiamo appreso: "Il timido non impara"] e accendi come un'aquila [a insegui il tuo apprendimento e non stanco, come è scritto (Isaia 40:31): "Solleveranno l'ala come aquile; correranno e non stanchi"], e rapidi come un cervo [per inseguire Mitzvoth], e forte come un leone [per sottomettere la tua inclinazione malvagia contro la trasgressione], per fare la volontà di tuo Padre celeste. Non voleva dire: "La" faccia sfacciata "di Gehinnom" [Questa espressione è usata perché la sfacciataggine è vista in faccia, vale a dire. (Proverbi 21:19): "Il malvagio è sfacciato in faccia"], e il "volto vergognoso" di Gan Eden. "Possa essere la tua volontà, OL nostro Dio che tu costruisca la tua città in fretta ai nostri giorni e dacci (noi) la nostra porzione nella Torah. [Cioè, proprio come ci hai concesso questo tratto (di vergogna), i segni del seme di Abramo sono vergogna, misericordia e benignità, così, può sia la tua volontà, ecc.]
Orchot Tzadikim
Our Sages said: "Anyone who does a transgression and is ashamed of his deed is forgiven for all his sins" (Berakoth 12b). And they said further, "He who has a sense of shame is destined for Paradise" (Aboth 5:42). And our Sages said, "Faith and a sense of shame are linked together, for the one who is ashamed before people shows that he believes in people. If he did not believe in the importance and worth of people he would not care for their opinion and therefore would not be ashamed before them." The wise man said, "If it brings you no shame do all that you desire."
And the opposite of all good traits that appear in the modest person are found in the impudent. When a man persists in this quality and increases in impudence he becomes very disgusting in the eyes of all people, no matter how wise he is. Many evils follow in the train of impudence. He who deals impudently with others will not be free from quarrels, hatred and jealousy. And he who is of the impudent ones denies the uniqueness of God. Such a person cannot bear the presence of a great man and cannot be gracious to the old, and all the transgressions in the Torah are trivial in his eyes — all because of his great impudence. And of him it is said : "The impudent to Gehenna!" (Aboth 5:20).
In this manner the sages of blessed memory warned us: "be brazen as a leopard... to do the will of your Father in Heaven" (Avot 5:20). And David said: "I will speak of Your testimonies before kings, and will not be ashamed" (Ps. 119:46).