A blunder at the right moment is better than cleverness at the wrong time.

Youth is a silly, vapid state, Old age with fears and ills is rife; This simple boon I beg of Fate - A thousand years of Middle Life.

It is the interest one takes in books that makes a library. And if a library have interest it is; if not, it isn't.

I am more fond of achieving than striving. My theories must prove to be facts or be discarded as worthless. My efforts must soon be crowned with success, or discontinued.

Advice is one of those things it is far more blessed to give than to receive.

A cynic is a man who looks at the world with a monocle in his mind's eye.

A guilty conscience is the mother of invention.