Musar su Deuteronomio 28:58

“You shall not curse powers, nor revile a chieftain among your people” (Exodus 22:27); “You shall not curse a deaf man” (Leviticus 19:14). And we were warned with this not to curse [any] man of Israel with [God’s] name or one of all of [His] appellations. And [the reason] the Torah mentions not to curse powers; a chieftain; and a deaf man, is to come to warn one not to curse a judge (the power mentioned here) when he finds him guilty in the trial, nor a chieftain when he punishes him, to dispatch him for his transgression. And it was necessary to mention a deaf man, lest you say, “There is no punishment for cursing him - since he does not hear, no pain will reach him from his curse.” And “You shall not curse powers” is written at the end of Parshat Mishpatim (Statutes) to say that you should not curse a judge that judges with these statutes. But you may curse a judge that is not proper. And our Rabbis, may their memory be blessed, said (Shevuot 36a), “One who curses his fellow or himself with [God’s] name is lashed.” And his punishment at the hand of the Heavens is very great, as it is stated (Deuteronomy 28:58-59), “If you fail to observe all the words of this Torah in the book, etc., to reverence this honored and awesome name, the Lord, your God; The Lord will inflict extraordinary plagues upon you, etc.” And our Rabbis, may their memory be blessed, explained (Temurah 3:2) the topic of this verse as one who curses his fellow or himself with [God’s] name.

When experiencing this fear [of G-d's exaltedness], a person will feel shame and tremble when standing before his Maker to pray or when performing any divine service. This is the praiseworthy fear which the pious great men were praised for. It is what Moshe referred to when he said: "to fear this glorious and awesome Name, the L-rd, your G-d" (Devarim 28:58).

One must also cleave to fear of Hashem, for love and fear go together. This is explained in Reishis Chochmah (Sha’ar HaYirah; Sha’ar HaAhavah; Preface; Ch. 1) and in Seifer Chareidim (Mitzvas HaTeshuvah, Ch. 1) commenting on the verses, “To fear the honorable and awesome name” (Devarim 28:58), “and to love Him” (Devarim 10:12). The basic idea is this: Whenever a person mentions Hashem’s name his entire body should be filled with trembling. And every time he recites a blessing he should enunciate it clearly and feel it with his entire body. He should certainly not spit out the words of the blessing hurriedly, Heaven forbid. I have often witnessed the following scenario among the masses. A person is holding some item of food or drink in his hand. What he would really like to do is just to toss it into his mouth but he realizes that he must recite a blessing. However, since his main goal is to enjoy his food he rattles off the blessing as quickly as he can without enunciating the words clearly. As I have already mentioned in Chapter Eighteen, the punishment for such conduct is very great. Recall the incident that is cited there from Seifer Chassidim. The same punishment awaits one who recites the Songs of Praise (Pesukei DeZimra) at the beginning of the service hurriedly, swallowing the letters and words. Most people are careless about this.