God made the world as an artist and that is why the world must learn from an artist.
Progress is impossible without change, and those who cannot change their minds cannot change anything.
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.
A life spent making mistakes is not only more honourable, but more useful than a life spent doing nothing.
Success does not consist in never making mistakes but in never making the same one a second time.