Musar su Salmi 66:3

Man is the ultimate purpose of the universe. This is something that all our commentators have been at pains to prove. It is the reason we say in our prayers on Rosh Hashanah זה היום תחלת מעשיך, "This day (the date on which Adam was created) is the beginning of Your works." The author of Kley Chemdah says that this is the meaning of Psalms 66,3: אמרו לאלקים מה נורא מעשיך, "Say to G–d how awesome are Your deeds." Significantly, the Psalmist does not speak about מה נוראים G–d's works in the plural, but sums them all up as a single deed נורא although the word מעשיך "Your deeds" is in the plural. What the Psalmist means is that all of G–d's deeds had but one aim, אדם, Man. This is why Man is a combination of terrestrial and celestial elements. Rashi explains this in his commentary on Genesis 2,7. This established a permanent linkage between terrestrial and Celestial creatures. It helped remove jealousy between the creatures of the "upper" world and the creatures of the "lower" world (Rashi ibid.). There remains a complaint [by the Celestial Forces] inasmuch as only man is at home on earth. This subject bears further investigation.

From these verses we learn that Israel is obligated to fear God, Blessed be He, and to occupy themselves with meditation over His Torah, and to fulfill His commandments and that from their meditation over the Torah they will understand the meaning of its directives and the new interpretations that may be obtained from each verse and they will grow wise in order to know God, may He be Blessed, and His strength and His power and his greatness and His great works, awesome and wondrous, as it is written, "Say unto God : 'How tremendous is thy work!' " (Ps. 66:3). And it is written, "Come, ye children, hearken unto Me; I will teach you the fear of the Lord" (Ps. 34:12).