If there was nothing wrong in the world there wouldn't be anything for us to do.
Success does not consist in never making mistakes but in never making the same one a second time.
Patriotism is, fundamentally, a conviction that a particular country is the best in the world because you were born in it…
The moment we want to believe something, we suddenly see all the arguments for it, and become blind to the arguments against it.
A life spent making mistakes is not only more honourable, but more useful than a life spent doing nothing.