In spite of these great marks of favor to Moses, the people still perceived the difference between the first two commandments, which they heard directly from God, and those that they learned through Moses' intercession. For when they heard the words, "I am the Eternal, thy Lord," the understanding of the Torah became deep-rooted in their hearts, so that they never forgot what they thus learned. But they forgot some of the things Moses taught, for as man is a being of flesh and blood, and hence ephemeral, so are his teachings ephemeral.
They hereupon came to Moses, saying: "O, if He would only reveal Himself once more! O that once more He would kiss us with the kisses of His mouth! O that understanding of the Torah might remain firm in our hearts as before!" Moses answered: "It is no longer possible now, but it will come to pass in the future world, when He will put His law in their inward parts, and write it in their hearts."