Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric.
To think I have spent my life on absolute muck.
The true spirit of delight...is to be found in mathematics as surely as in poetry.
Either man will abolish war, or war will abolish man.
Beggars do not envy millionaires, though of course they will envy other beggars who are more successful.
Punctuality is a quality the need of which is bound up with social co-operation.