Midrash su Isaia 27:11

Our Rabbis taught: Once in a certain place, a wild ass used to injure the people; so they came and informed R. Chanina b. Dosa. "Show me the cave where the animal is hidden," said he to them. Whereupon they went and showed him. He then placed the sole of his foot on the hole, and when the animal came forth he hit it and the animal fell dead. R. Chanina then took it on his shoulder and brought it to the academy, saying to them: "My sons, see it is not the wild ass that kills, but sin kills." They then all exclaimed, "Woe unto the man who is met by a wild ass, but woe unto the wild ass when it meets R. Chanina b. Dosa," R. Ami said, "Great is knowledge, for it is the first benediction in the week day's prayer." Further said R. Ami, "Great is knowledge for it is placed between two Divine names, as it is said (I. Sam. 2, 3.) A God of knowledge is the Lord. Mercy is to be denied to him who has no knowledge; for it is said (Is. 27, 11.) They are a people of no understanding , therefore he that maketh them will not have mercy on them." R. Elazar said: "Great is the Temple for it is placed between two Divine names, as it is written (Ex. 15, 17.) Thou hast wrought for Thee to dwell in, O Lord, the sanctuary, O Lord!" R. Elazar also said: "Every man who possesses knowledge is considered worthy to cause the Temple to be built in his days, for knowledge is placed between two Divine names, and the Temple is placed between two Divine names." He was questioned by R. Acha of Karchina: "According to your opinion, retaliation must also be of great value, for it is written (Ps. 94, 1.) O God of vengeance, Lord!" "Yea," he replied, "when necessary it is of course of great value," and thus is meant by the saying of Ulla, "Why is the word vengeance repeated? O God of vengeance. Lord! O God of vengeance! One for a good purpose and one for a bad purpose; for good, as it is written (Deu. 33, 2.) He shone forth from Mt. Paran; for bad, as it is written (Ps. 94, 1.) O God of vengeance, Lord! O God of vengeance, shine forth!"

R. Juda said in the name of Rab: "He who withholds from imparting an Halacha to a disciple is considered as if he would rob him of the inheritance of his ancestors, for it is said (Deut. 33, 4) The law which Moses commanded us is the inheritance of the congregation of Israel. Hence the law is considered as an inheritance to all Israel since the creation of the world." R. Chana b. Bizna, in the name of R. Simon the Pious said: "He who withholds (or denies) the explanation of an Halacha to a disciple, even the embryos in the entrails of their mothers, curse him, as it is said (Prov. 11, 26) Him that withholdeth corn, (Fol. 92) (l'om) the people will (ye'kabuhu) denounce, and the word l'am refers to embryos, as it is said (Num. 23, 8) How shall I denounce (Kabo) whom God … , and Bar means the Torah, as it is said (Ps. 2) And if one do teach." What will be his reward for such? Raba, in the name of R. Shesheth, said: "He will be rewarded with the blessing with which Joseph was blessed, as it is said (Pr. 11, 26) But blessing will be heaped upon the head of the one (Mashbir) that selleth it, and Mashbir refers to Joseph; as it is said (Gen. 48, 6) And Joseph, he was the governor over the land, he it was that sold corn to all the people." R. Shesheth said again: "He who teaches the Torah in this world will be rewarded by teaching it in the world to come, as it is said (Prov. 11, 25) He that refresheth [others] will do the same in the future." Mar Zutra said: "Whence do we infer the resurrection from the Torah? It is said (Deut. 33, 6) May Reuben live, and not die, i.e., he may live in this world, and not die in the world to come." Rabina says: From the following (Dan. 12, 2) And many of those that sleep in the dust of the earth shall awake, some to everlasting life, and some to disgrace and everlasting abhorrence. And R. Ashi said: From (Ib. ib. 13) But thou, go [thy way] toward the end; and thou shalt rest, and arise for thy lot at the end of the days. R. Elazar said: "A leader of a congregation, who leads them humbly, will be rewarded by leading the same in the world to come, as it is said (Is. 49, 10) For he that hath mercy on them will lead them, and by springs of water will he guide them." R. Elazar said again: "Wisdom is of great importance, as it was placed between two divine names (I Sam. 2, 3) For a God of knowledge is the Lord." Another thing said R. Elazar: "Every man who possesses wisdom may consider himself as if the Temple were built in his days, as both wisdom and temple are placed between two divine names." R. Elazar said further: "He who possesses no knowledge does not merit that one should have mercy upon him, as it is said (Is. 27, 11) For it is not a people of understanding; therefore he that made it will not have compassion upon it, and he that formed them will not be gracious unto them." R. Elazar said also: "He who feeds one who does not possess any knowledge, will suffer as a reward for it, as it is said (Ob. 1, 7) They that eat thy bread have struck thee secretly a wound, there is no understanding in them." R. Elazar said again: "A man that has no knowledge will finally be exiled, as it reads (Is. 5, 13) Therefore are my people led into exile, for want of knowledge."