"And although I have seen nothing but black crows in my life, it doesn't mean that there's no such thing as a white crow. Both for a philosopher and for a scientist it can be important not to reject the possibility of finding a white crow. You might almost say that hunting for 'the white crow' is science's principal task."
"A philosopher knows that in reality he knows very little. That is why he constantly strives to achieve true insight. Socrates was one of these rare people. He knew that he knew nothing about life and about the world. And now comes the important part: it troubled him that he knew so little."
"A true philosopher must never give up."
"He could very likely have appealed for leniency. At least he could have saved his life by agreeing to leave Athens. But had he done this he would not have been Socrates. He valued his conscience--and the truth-- higher than life."
"But understanding will always require some effort. You probably wouldn't admire a friend who was good at everything if it cost her no effort."
"A hydrogen atom in a cell at the end of my nose was once part of an elephant's trunk. A carbon atom in my cardiac muscle was once in the tail of a dinosaur."