What other dungeon is so dark as one's own heart! What jailer so inexorable as one's self!
Vigorous writing is concise.
Treat all disasters as if they were trivialities but never treat a triviality as if it were a disaster.
As long as you derive inner help and comfort from anything, keep it.
The fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd; indeed in view of the silliness of the majority of mankind, a widespread belief is more likely to be foolish than sensible.
My grandmother started walking five miles a day when she was sixty. She's ninety-seven now, and we don't know where the hell she is.
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.