The relation between what we see and what we know is never settled.

El miedo es la prisión del corazón.

The act of discovery is not reserved for the genius alone.

Whenever people talk to me about the weather, I always feel certain that they mean something else.

I have come to believe that a great teacher is a great artist and that there are as few as there are any other great artists. Teaching might even be the greatest of the arts since the medium is the human mind and spirit.

I can never be safe; I always try and go against the grain. As soon as I accomplish one thing, I just set a higher goal. That's how I've gotten to where I am.