But why stop at a sentence? Maybe this is true of every single word of the Torah -- or even every letter? In fact this is so, and it combines with another idea that every Torah concept has four levels of meaning, from basic to esoteric. The Talmud also tells us that Rabbi Akiva, the leading teacher of Torah in his generation, could explain not only every letter of the Torah but even the little "crowns" that adorn the letters in the handwritten Torah scroll.