"The roots of education are bitter, but the fruit is sweet"
"Don't you have time to think?"
"The first principle is that you must not fool yourself. And you are the easiest person to fool. "
"Nothing exists except atoms and empty space. Everything else is opinion. "
"I would rather have questions that can't be answered than answers that can't be questioned"
"I would trade all my technology for an afternoon with Socrates"
"Opinion is the medium between knowledge and ignorance"
"I learned very early the difference between knowing the name of something and knowing something."
"It is the mark of an educated man to be able to entertain a thought without accepting it"
"We are what we repeatedly do. Excellence, then, is not an act, but a habit"
"The unexamined life is not worth living"
"The pleasure of finding things out."
"It's not that I am so smart. But I stay with the questions much longer."
"Judge a man by his questions, not by his answers."
"Any fool can know. The point is to understand."
"We cannot solve our problems with the same thinking we used when we created them."