“It is not possible to know how far the influence of any amiable, honest-hearted duty-doing man flies out into the world, but it is very possible to know how it has touched one's self in going by.”

“Only those who will risk going too far can possibly find out how far one can go.”

“The big problem of any young person's life is to have models to suggest possibilities. Nietzsche says, 'Man is the sick animal.' Man is the animal that doesn't know what to do with itself. The mind has many possibilities, but we can live no more than one life. What are we going to do with ourselves?”

“There are three basic problems: how a mind can know the world of nature, how it is possible for one mind to know another, and how it is possible to know the contents of our own minds without resort to observation or evidence. It is a mistake, I shall urge, to suppose that these questions can be collapsed into two, or taken into isolation.”

“I've always wanted to get as far as possible from the place where I was born. Far both geographically and spiritually. To leave it behind ... I feel that life is very short and the world is there to see and one should know as much about it as possible. One belongs to the whole world, not just one part of it.”

“Ambition leads me not only farther than any other man has been before me, but as far as I think it possible for man to go.”