If there was nothing wrong in the world there wouldn't be anything for us to do.
The moment we want to believe something, we suddenly see all the arguments for it, and become blind to the arguments against it.
Marriage is an alliance entered into by a man who can't sleep with the window shut, and a woman who can't sleep with the window open.
The power of accurate observation is frequently called cynicism by those who have not got it.
Progress is impossible without change, and those who cannot change their minds cannot change anything.
A life spent making mistakes is not only more honourable, but more useful than a life spent doing nothing.