The secret of greatness is simple: do better work than any other man in your field - and keep on doing it.
The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' (I found it!) but 'That's funny ...'
Patriotism is your conviction that this country is superior to all other countries because you were born in it.
The happiest is the person who suffers the least pain; the most miserable who enjoys the least pleasure.
Walking is the best possible exercise. Habituate yourself to walk very far.
Editor: a person employed by a newspaper, whose business it is to separate the wheat from the chaff, and to see that the chaff is printed.
An adventure is only an inconvenience rightly considered. An inconvenience is an adventure wrongly considered.