It seems as though every time you learn something new you have to give up something.

You have nothing to do but mention the quantum theory, and people will take your voice for the voice of science, and belive anything.

It is the end of happiness and the beginning of peace.

The only secrets are the secrets that keep themselves.

It is a woman's business to get married as soon as possible, and a man's to keep unmarried as long as he can.

I have always held the religion of Muhammad in high estimation because of its wonderful vitality. It is the only religion which appears to me to possess that assimilating capability to the changing phase of existence which can make itself appeal to every age... I have studied him - the wonderful man, and in my opinion far from being an Anti-Christ he must be called the Saviour of Humanity.

The man who has never made a mistake will never make anything else.