GEN781 If we teach someone Torah it is as if we have created him.  Rashi cites the Midrash [Genesis Rabbah 39:14] which relates that Abraham converted the men and Sarah converted the women.  The Torah, therefore, credits Abraham and Sarah with making them, as it is written, “that they had made.”  The Talmud Sanhedrin 99b states in connection with this verse, that when one person teaches another Torah, God considers it as if he has created him.  Teaching Torah is the greatest chesed [act of loving kindness] that one can bestow upon another person.  If you give someone food or money, you are helping him for a limited amount of time.  But if you teach someone Torah, you are helping his soul for all eternity. … Therefore, a person should cherish the opportunity to teach Torah to others.  One errs if he thinks that only professional teachers and scholars are able to teach Torah.  Anyone who has accurately acquired even a small amount of Torah can and should find some time to share his knowledge with those who know less. There are many people who did not have the opportunity to study Torah when they were young, but who would be anxious to begin learning if offered the opportunity. … If someone wants to each but for some reason is not able to teach an entire class, he should at least try on an individual basis.  … The Chofetz Chayim writes that although teaching Torah is an act of chesed, a person does not fulfill his obligation to do chesed if he does not also help others with their material needs. Ahavat Chesed, part 3, ch. 7, ft.   PLYN 45-6