It is in the ability to deceive oneself that the greatest talent is shown.
It is almost impossible systematically to constitute a natural moral law. Nature has no principles. She furnishes us with no reason to believe that human life is to be respected. Nature, in her indifference, makes no distinction between good and evil.
Truth possesses within herself a penetrating force, unknown alike to error and falsehood. I say 'truth' and you understand my meaning. For the beautiful words truth and justice need not to be defined in order to be understood in their true sense.
Nine tenths of education is encouragement.
It's not by amusing oneself that one learns.