Musar su Ecclesiaste 12:13

In the first chapter we shall speak about the quality of pride. How good it is that it occurs at the very beginning of all the chapters because of the obligation of man to separate himself from it! For pride is the doorway to many evils and we have seen nothing as evil as arrogance in all of the qualities. Therefore, a man must be wise and lead pride along paths that are worthy, and thrust it away from the place where it is not proper for it to be.

"The end of the matter, all having been heard: fear God, and keep His commandments; for this is the whole man." (Eccl. 12 : 13)

Kohelet 12,13 states: "The sum of the matter, when all has been considered: 'Fear the Lord and keep His commandments, for that is man's whole duty.'" This is a reference to the commandment stated in our portion to revere G–d, to serve Him, to cleave to Him and to swear in His name. It is a commandment of a general all-embracing nature. Because the commandment covers so much ground, the Torah introduces it (10,12) with the words: "And now, what does the Lord ask of you, etc.?" I have explained the meaning of יראת שמים reverence for G–d, at length in my treatise עשרה מאמרים. It includes awareness of the unity of G–d as well as serving the Lord, especially the commandments listed in this פרשה. This commandment includes that we must be aware of G–d's unity and the need to serve Him. Why would the Torah have to tell us separately to swear by the name of G–d only? The reason must be that the very mention of G–d's name one reminds one of the duty to serve Him and to revere Him. Once one does so one would certainly not perjure oneself.