“The range of human knowledge today is so great that we’re all specialists and the distance between specializations has become so great that anyone who seeks to wander freely between them almost has to forego closeness with the people around him.”

“Like those in the valley behind us, most people stand in sight of the spiritual mountains all their lives and never enter them, being content to listen to others who have been there and thus avoid the hardships.”

“In the high country of the mind one has to become adjusted to the thinner air of uncertainty…”