Just do what must be done. This may not be happiness, but it is greatness.
No man who is occupied in doing a very difficult thing, and doing it very well, ever loses his self-respect.
Patriotism is, fundamentally, a conviction that a particular country is the best in the world because you were born in it…
Success does not consist in never making mistakes but in never making the same one a second time.
The moment we want to believe something, we suddenly see all the arguments for it, and become blind to the arguments against it.