"We haven't got the power to destroy the planet -- or to save it. But we might have the power to save ourselves."

"When I was in England, I experimented with marijuana a time or two, and I didn't like it and didn't inhale and never tried it again."

"All general statements are false."

"It's wonderful ... doing the impossible!"

"No man who has once heartily and wholly laughed can be altogether irreclaimably bad."

"If there is no struggle, there is no progress. Those who profess to favor freedom and yet renounce controversy are people who want crops without ploughing the ground."

"Big jobs usually go to the men who prove their ability to outgrow small ones."

"Rare is the person who can weigh the faults of others without putting his thumb on the scales."

"Outside show is a poor substitute for inner worth."

"During the Samuel Johnson days they had big men enjoying small talk; today we have small men enjoying big talk."

"Every man is wise when attacked by a mad dog; fewer when pursued by a mad woman; only the wisest survive when attacked by a mad notion."

"Experience is a hard teacher. She gives the test first and the lessons afterwards."