“That which does not kill us makes us stronger.”

“A man is called selfish not for pursuing his own good, but for neglecting his neighbour's.”

“Act only according to that maxim whereby you can at the same time will that it should become a universal law.”

“Act that your principle of action might safely be made a law for the whole world.”

“To have a right to do a thing is not at all the same as to be right in doing it.”