“[we see that] science is eminently perfectible, and that each theory has constantly to give way to a fresh one.”

“Well, I feel that we should always put a little art into what we do. It's better that way.”

“Science, my lad, is made up of mistakes, but they are mistakes which it is useful to make, because they lead little by little to the truth.”

“Science, my boy, is made up of mistakes, but they are mistakes which it is useful to make, because they lead little by little to the truth.”

“Man is never perfect, nor contended.”

“We may brave human laws, but we cannot resist natural ones.”

“I see that it is by no means useless to travel, if a man wants to see something new”