You should not live one way in private, another in public.
The release of atomic energy has not created a new problem. It has merely made more urgent the necessity of solving an existing one.
Zoo: An excellent place to study the habits of human beings.
Do not weep; do not wax indignant. Understand.
If there is one thing worse than being an ugly duckling in a house of swans, it's having the swans pretend there's no difference.
Give a man a fish and you feed him for a day. Teach a man to fish and you feed him for a lifetime.
Sometimes the cure for restlessness is rest.