We should live and learn; but by the time we've learned, it's too late to live.
A blunder at the right moment is better than cleverness at the wrong time.
A living gale is better than a dead calm.
Reward is its own virtue.
Invitation is the sincerest flattery.
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.