(8) The tenth, in clinging to colleagues, because a person when they are alone, does not receive Torah . . . The eleventh, by debate of students, and this is because colleagues imitate one another, and thus they imitate their teacher; in the first chapter of Taanit (Bavli Taanit 7a:12), "Rav Nahman bar Yitzhak said: why are words of Torah compared to wood, as it says, (Proverbs 3:18) 'it is a tree of life to those who hold it'? As a small piece of wood ignites a big one, so small words of Torah sharpen big ones; and this is also as Rabbi Hanina said, I learned a lot of Torah from my teachers; from my colleagues I learned more; from my students I learned more than all of them." And the reason is very clear, because it is similar to a tree that doesn't get lit, and thus is a great scholar, as their accomplishment is very great, so they don't begin to ask and to debate in wisdom according to the greatness of their accomplishment, and the simplicity of their intelligence there is no debate, which is questioning, and one needs for every debate a question to exclude---the great ones don't have the question, and because of this it says that the little ones sharpen the great ones, because they ask more, and then the scholar has to answer, and this is likened to the small piece of wood which ignites the big one, as the fire catches more with the small, and thus the lesser one is the beginning of the questioning and the debate, and that's why it says in the debate of students, because the essense of debate comes from students. And for that reason it says I learned a lot of Torah from my teachers, because they handed the wisdom on to me, and from my colleagues more, because they ask each other and stand on the essense of wisdom, and from my students more than all of them, because they debate and sharpen more with questioning, and this matter is clear.