“Let us give ourselves indiscriminately to everything our passions suggest, and we will always be happyConscience is not the voice of Nature but only the voice of prejudice.”

“Sometimes a woman's love of being loved gets the better of her conscience, and though she is agonized at the thought of treating a man cruelly, she encourages him to love her while she doesn't love...”

“Your conscience is the measure of the honesty of your selfishness.Listen to it carefully.”

“I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettie...”

“To know the history of science is to recognize the mortality of any claim to universal truth. ”

“The scientist only imposes two things, namely truth and sincerity, imposes them upon himself and upon other scientists.”