One can also look at this question from another point of view, and that is that every person has a certain amount of intelligence, but everyone who sees him or speaks to him adds something to his intelligence or deducts something from it; he either gives it to him or he takes it away from him. And a third aspect is that in the light of the intelligence of some people one can see life more clearly. This is not a passing light; it shines on just as the light of the sun shining on the earth is not in any way diminished by it.