We know that it is possible to harness desire to many interests, that evil is one form of a desire, and not the nature of it.

The first principle of a civilized state is that power is legitimate only when it is under contract.

There is but one bond of peace that is both permanent and enriching: The increasing knowledge of the world in which experiment occurs.

Life is an irreversible process and for that reason its future can never be a repetition of the past.

The radical novelty of modern science lies precisely in the rejection of the belief... that the forces which move the stars and atoms are contingent upon the preferences of the human heart.

Popular government has not yet been proved to guarantee, always and everywhere, good government.

It is so much easier to talk of poverty than to think of the poor.