A man’s mind stretched by a new idea can never go back to its original dimensions.
Certainty, generally, is illusion, and repose is not the destiny of man.
No generalization is wholly true, not even this one.
The biggest tragedy in America is not the great waste of natural resources – though this is tragic; the biggest tragedy is the waste of human resources because the average person goes to his grave with his music still in him.
Truth is tough. It will not break, like a bubble, at a touch; nay, you may kick it about all day like a football, and it will be round and full at evening.
~ Oliver Wendell Holmes, Sr.