בֵּ֛ן יְכַבֵּ֥ד אָ֖ב וְעֶ֣בֶד אֲדֹנָ֑יו וְאִם־אָ֣ב אָ֣נִי אַיֵּ֣ה כְבוֹדִ֡י וְאִם־אֲדוֹנִ֣ים אָנִי֩ אַיֵּ֨ה מוֹרָאִ֜י אָמַ֣ר ׀ יְהוָ֣ה צְבָא֗וֹת לָכֶם֙ הַכֹּֽהֲנִים֙ בּוֹזֵ֣י שְׁמִ֔י וַאֲמַרְתֶּ֕ם בַּמֶּ֥ה בָזִ֖ינוּ אֶת־שְׁמֶֽךָ׃
내 이름을 멸시하는 제사장들아 나 만군의 여호와가 너희에게 이르기를 아들은 그 아비를, 종은 그 주인을 공경하나니 내가 아비일진대 나를 공경함이 어디 있느냐 내가 주인일진대 나를 두려워함이 어디 있느냐 하나 너희는 이르기를 우리가 어떻게 주의 이름을 멸시하였나이까 하는도다
Rashbam
PUT YOUR HAND UNDER MY THIGH. And similarly with Yosef when he swore to Ya'akov. The making of a covenant or an oath of a son, or of a slave to his master was in this fashion, for they shared the aspect of subjugation, and it is thus written (Mal. 1:6), "A son should honor his father, and a slave his master." However, handshaking or cutting an object in two for a covenant and passing between the pieces is found with other persons.
Rabbeinu Yonah
and the honor of your fellow like the reverence of your teacher, and the reverence of your teacher like the reverence of Heaven: Honor is included in reverence, but reverence is not included in honor, as Malakhi stated (Malachi 1:6), "A son should honor his father, and a slave his master; and if I am a father, where is My honor, yet if I am a master, where is My reverence, etc.?" - he said "fear" with a slave and "honor" with a son, as the matter is like this. And here, it mentioned fear for the teacher and for Heaven - as one needs to fear [teachers], because fear of the teacher is the foundation of fear of Heaven. [This is] since he teaches him Torah and 'to fear the Lord, his God.' And one who loves the Torah, loves the sages and will fear the word of God. And to the one who teaches him, there is within him the fear of Heaven and walking in the good path - that is why it says, "the reverence of your teacher." But with the student and the fellow it [only] mentioned honor, as one is not obligated in their reverence. It comes out that you have learned that the honor of your student needs to be as dear in your eyes as the reverence of Heaven, that is incumbent upon you. And you may not negate the one, [just] like the other - as they are all dependent, one upon the other. And, if so, the four of them are all of one level - the honor, according to the honor [of each]; and the reverence, according to the reverence [of each].
Derekh Chayyim
And it says after this that your Torah should be such that you can answer a heretic. Which is to say that just like there is a Mitzvah for a person to learn Torah and to acquire the Torah, which is the Torah of Truth (Malachi: 1, 6), so to it is fitting that a person nullifies 'false belief systems' from the world such that Truth increased in the world. For if Falsity is left to be in the world, the end is that Falsity, God Forbid, will cause Truth to be lost and nullify it such that Falsity dominates the world, and therefore, take much care that you do not give any foothold for Falsity, rather that you know what to answer to a heretic.