Midrash su Deuteronomio 29:8

R. Joshua b. Levi said: "The following is written in the Pentatuch, repeated in the Prophets, and a third time in he Hagiographa: Whoever occupies himself with the [study of the] Torah is prosperous in all his undertakings. In the Pentateuch, as the passage says (Deut. 9, 8) Keep ye therefore the words of this covenant, and do them, that ye may prosper in all that ye do; repeated in the Prophets, as the passage states (Jos. 1, 8) This book of the law shall not depart out of thy mouth, but thou shalt meditate therein day and night; that thou mayest observe to do according to all that is written therein; for then shalt thou make thy way prosperous, and then thou shalt have good success. And a third time in Hagiographa, as the passage reads (Ps. 1, 2-3) But his delight is in the law of the Lord, and in His law doth he meditate day and night. And he shall be like a tree replanted by streams of water, that bringeth forth its fruit in its season, and whose leaf doth not wither; and whatsoever he doth shall prosper." R. Alexander announced: "Who wants to live, who wants to live?" And a big crowd surrounded him. He then referred them to (Ib. 34, 14-16) Keep thy tongue from evil, etc. One might say, since I keep my tongue from evil, and my lips from speaking guile, I may engage my time in sleeping. The passage therefore states, Depart from evil and do good (Tob), and good (Tob), refers to the Torah, as it is said (Pr. 4, 2) For I give you good doctrine; forsake ye not My Torah.

Reuben went in the days of harvest, etc. Raba b. Isaac said in the name of Rab: "Infer from this that the righteous do not stretch their hands out to robbery." What were the dudaim which Reuben found? Rab said: "They were mandrakes," and Samuel said: "Violet flowers." R. Alexandri said: "Those who occupy themselves with the Torah for its own sake [for no selfish ends] cause peace to reign in the heavenly household and in the household here below," as it is said (Is. 27, 15) "If he would but take hold of my strength, make peace with me, make peace with me." And Rab said: "He is considered as if he had built both palaces of heaven and earth," as it is said: (Ib. 51, 16) "And I have placed My words in thy mouth, and with the shadow of My hand have I covered thee: To plant the heavens and lay the foundations of the earth." R. Jochanan said: "He also protects the world, as it is said (Ib.) "With the shadow of My hand have I covered thee." And Levi said: "He brings nearer the redemption, as it is said (Ib.) To say to Zion, Thou art My people." Resh Lakish said: "He who teaches the Torah to his neigbor's son, is considered by Scripture as if he had created him," as it is said: (Gen. 12, 5) "And the persons they had obtained Charan." R. Elazar said: "He is considered as the creator of the law, as it is said: (Deut. 29, 8) Keep ye, therefore, the words of the covenant, and do them." And Raba said: "He is considered as the creator of himself," as it is said, "And do them; do not read otham (them), but atem, (ye yourselves)." R. Abahu said: "He who causes his neighbor to do a meritorious act, is considered by Scripture as if he himself has done it, for it is said: (Ex. 17, 5) "And take in thy hand thy staff wherewith thou smotest the river, and go." Did he, then, smite the river? Did not Aaron do this? But this is to teach thee that whoever causes his neighbor to do a meritorious act is considered by Scripture as if he himself had done it."