Whether man is disposed to yield to nature or to oppose her, he cannot do without a correct understanding of her language

What makes our opponents useful is that they allow us to believe that without them we would be able to realize our goals.

Stupidity, outrage, vanity, cruelty, iniquity, bad faith, falsehood - we fail to see the whole array when it is facing in the same direction as we.

I don't judge a regime by the damning criticism of the opposition, but by the ingenuous praise of the partisan.

Renown? I've already got more of it than those I respect, and will never have as much as those for whom I feel contempt.

Nothing leads the scientist so astray as a premature truth.

Far too often the choices reality proposes are such as to take away one's taste for choosing.