I feel about airplanes the way I feel about diets. It seems to me they are wonderful things for other people to go on.
A mind troubled by doubt cannot focus on the course to victory.
He will always be a slave who does not know how to live upon a little.
The knowledge of the world is only to be acquired in the world, and not in a closet.
It is only possible to live happily ever after on a day-to-day basis.
The meeting of two personalities is like the contact of two chemical substances: if there is any reaction, both are transformed.
No great improvements in the lot of mankind are possible until a great change takes place in the fundamental constitution of their modes of thought.