A man ought to be able to be fond of his wife without making a fool of himself about her.
The moment we want to believe something, we suddenly see all the arguments for it, and become blind to the arguments against it.
Progress is impossible without change, and those who cannot change their minds cannot change anything.
No man who is occupied in doing a very difficult thing, and doing it very well, ever loses his self-respect.
The power of accurate observation is frequently called cynicism by those who have not got it.
Success does not consist in never making mistakes but in never making the same one a second time.