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

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

I take it that the good of mankind means the attainment, by every man, of all the happiness which he can enjoy without diminishing the happiness of his fellow men.