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In sorrow he learned this truth: Though one may return to the place of his birth, he cannot go back to his youth

A child learns to discard his ideals, whereas a grown-up never wears out his short pants.

One's first step in wisdom is to question everything - and one's last is to come to terms with everything

To learn something new, take the path that you took yesterday

I compare human life to a large mansion of many apartments, two of which I can only describe, the doors of the rest being as yet shut upon me

Experience is never limited, and it is never complete; it is an immense sensibility, a kind of huge spider-web of the finest silken threads suspended in the chamber of consciousness, and catching every air-borne particle in its tissue.