Not to engage in the pursuit of ideas is to live like ants instead of men.

All books will become light in proportion as you find light in them.

"The telephone book is full of facts, but it doesn't contain a single idea."

"The purpose of learning is growth, and our minds, unlike our bodies, can continue growing as we continue to live."

"Ask others about themselves, at the same time, be on guard not to talk too much about yourself."