Musar su I Re 10:78

And King Solomon, peace be upon him, essentially composed the book of Ecclesiastes in order that man put to his heart that the world is a vanity of vanities and [that] he only use it for the service of the Creator, may He be elevated. And he made his intention known in his introduction and his conclusion: For he opened and said, (Ecclesiastes 1:2), "Vanity of vanities, said Kohelet, vanity of vanities - everything is vanity." And our Rabbis, may their memory be blessed, said (Kohelet Rabbah 3:13), "If another man had said this, we would have said, 'Maybe he has not gathered two small coins in his entire days; therefore the world is considered like vanity in his eyes.' However it is appropriate for King Solomon - about whom it is written (I Kings 1:27), 'The king made silver as plentiful in Jerusalem as stones' -to say that the world is vanity of vanities." And he concluded his book and said (Ecclesiastes 12:13), "The sum of the matter, when all is said and done; revere God and observe His commandments, for this is all of man."

And Solomon was the richest of all men, as it is written, "And the king made silver to be in Jerusalem as stones" (I Kings 10:27). For him it was proper to say "Vanity of vanities, all is vanity" (Eccl. 1:2), and one ought not to busy himself with anything save for the reverence of Heaven. And thus did Moses, our teacher, peace be upon him, say: "And now, Israel, what doth the Lord thy God require of thee, but to fear the Lord thy God" (Deut. 10:12). And thus did David, the King, peace be upon him, say: "The fear of the Lord is the beginning of wisdom" (Ps. 111:10).

Great is charity — it is this quality for which the Holy One, Blessed be He, will be praised when he brings salvation to Israel, as it is said, "I that speak in victory, mighty to save" (Is. 63:1). Great is charity — it brings honor and life to those who practice it, as it is said "He that followeth after righteousness and mercy, findeth life, prosperity and honour" (Prov. 21:21). Great is charity — with this quality, the Holy One, Blessed be He, will redeem Israel, as it is said, "Zion shall be redeemed with justice and they that return of her with righteousness" (Is. 1:27). Great is charity — with this quality Abraham, our father, was praised, as it is said, "And he trusted in God and He reckoned it to him for righteousness" (Gen. 15:6), and it is said further, "For I have known him, to the end that he may command his children and his household after him, that they may keep the way of the Lord, to do righteousness and justice" (Gen. 18:19). Great is charity — with this quality, David, King of Israel, was praised, as it is said, "And David executed justice and righteousness unto all his people" (II Sam. 8:15). Great is charity — with this quality King Solomon was praised, as it is said. "Blessed be the Lord thy God, who delighted in thee, to set thee on the throne of Israel; because the Lord loved Israel for ever, therefore made He thee king, to do justice and righteousness" (I Kings 10:9). Great is charity — it reaches up to the very Throne of Glory, as it is said, "Righteousness and justice are the foundation of Thy throne" (Ps. 89:15). Great is charity — through it Israel was praised, as it is said, "And it shall be righteousness unto us" (Deut. 6:25). Great is charity — with it, the Holy One, Blessed be He, will in future be praised on the Day of Judgment, as it is said, "But the Lord of hosts is exalted through justice, and God the Holy One, is sanctified through righteousness" (Is. 5:16). Great is charity — it accompanies those who practice it at the hour of their departure from the world, as it is said, "And thy righteousness shall go before thee, the glory of the Lord shall be thy reward" (Is. 58:8). Great is kindness — with it the world was built, as it is said, "The world on mercy is built" (Ps. 89:3). Wherefore a man should cleave to the quality of generosity which brings about all these good things (Mekhilta on Ex. 15:13).