The first precept was never to accept a thing as true until I knew it as such without a single doubt.
The happiest is the person who suffers the least pain; the most miserable who enjoys the least pleasure.
If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things.
To do anything truly worth doing, I must not stand back shivering and thinking of the cold and danger, but jump in with gusto and scramble through as well as I can.
The man who is swimming against the stream knows the strength of it.
What's the earth With all its art, verse, music, worth - Compared with love, found, gained, and kept?
Nothing in the world can take the place of Persistence. Talent will not; nothing is more common than unsuccessful men with talent. Genius will not; unrewarded genius is almost a proverb. Education will not; the world is full of educated derelicts. Persistence and determination alone are omnipotent. The slogan 'Press On' has solved and always will solve the problems of the human race.