Rabbi Yehoshua ben Levi advised: And be careful to continue to respect an elder who has forgotten his Torah knowledge due to circumstances beyond his control. Even though he is no longer a Torah scholar, he must still be respected for the Torah that he once possessed. As we say: Both the tablets of the Covenant and the broken tablets are placed in the Ark of the Covenant in the Temple. Even though the first tablets were broken, their sanctity obligates one not to treat them with contempt. An elder who forgot the Torah knowledge he once possessed is like these broken tablets.
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