Life is a great big canvas; throw all the paint on it you can.
Nothing can be so amusingly arrogant as a young man who has just discovered an old idea and thinks it is his own.
Science is nothing but developed perception, interpreted intent, common sense rounded out and minutely articulated.
To try to be better is to be better.
Always be nice to those younger than you, because they are the ones who will be writing about you.
Humor is the only test of gravity, and gravity of humor; for a subject which will not bear raillery is suspicious, and a jest which will not bear serious examination is false wit.
You cannot run away from a weakness; you must sometimes fight it out or perish. And if that be so, why not now, and where you stand?