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Every book is a quotation; and every house is a quotation out of all forests, and mines, and stone quarries; and every man is a quotation from all his ancestors.

The study of mathematics is like air or gravity—it is everywhere, and you can't see it, but you know it's there.

I was in the middle before I knew that I had begun.

Purpose-driven companies outlast those focused solely on profit.

I don’t let success change me, I let it improve me.