Thomas Huxley

The great thing in the world is not so much to seek happiness as to earn peace and self-respect.

I protest that if some great Power would agree to make me always think what is true and do what is right, on condition of being turned into a sort of clock and would up every morning before I got out of bed, I should instantly close with the offer.

The great tragedy of science – the slaying of a beautiful hypothesis by an ugly fact.

Every great advance in natural knowledge has involved the absolute rejection of authority.