חוליה בשרשרת

Moses received the Torah at Sinai and transmitted it to Joshua, Joshua to the elders, and the elders to the prophets, and the prophets to the Men of the Great Assembly. They said three things: Be patient in [the administration of] justice, raise many disciples and make a fence round the Torah.

Only take heed to thyself, and keep thy soul diligently, lest thou forget the things which thine eyes saw, and lest they depart from thy heart all the days of thy life; but make them known unto thy children and thy children’s children; the day that thou stoodest before the LORD thy God in Horeb, when the LORD said unto me: ‘Assemble Me the people, and I will make them hear My words that they may learn to fear Me all the days that they live upon the earth, and that they may teach their children.’

Only take heed to yourself, etc, lest you forget [After citing Rashi's words above,] but it is not correct at all. Rather this verse, in my opinion, is a negative commandment, [which] it warns about very much. As when it stated that we should be careful with all of the commandments and guard the statutes and the judgments to do them, it went back to state, "However I am warning you very much to be on guard and guard yourself very very much to remember from where the commandments came to you, such that you not forget the stand at Mount Sinai with all of the things that your eyes saw there - the voices and the torches, His glory and His greatness, and His words that you heard from the fire. And you shall inform your children and your children's children for all time [about] the thing that your eyes saw at this great stand. And the explanation of the reason is in order that you should learn to fear Him all of the days, and teach your children for all generations. If so, you shall do this and not forget Me." And behold, before it mentions the [Ten Commandments], it warns with a negative commandment, that we should never forget anything from this stand and never remove it from our hearts. And it [also] commanded with a positive commandment that we should inform all of our progeny from one generation to another [about] everything that was [perceived] there through sight and hearing...