"Not to see many things, not to hear them, not to let them approach one--first piece of ingenuity, first proof that one is no accident but a necessity."

"The man of knowledge must be able not only to love his enemies but also to hate his friends."

"For others do I wait... for higher ones, stronger ones, more triumphant ones, merrier ones, for such as are built squarely in body and soul: laughing lions must come."

"One must still have chaos in oneself to give birth to a dancing star."

"When you stare into the abyss the abyss stares back at you."

"It is hard enough to remember my opinions, without also remembering my reasons for them!"

"To strive, to seek, to find, and not to yield."

"That's one small step for a man, one giant leap for mankind."

"Cheese - milk's leap toward immortality."

"Our business in life is not to get ahead of others, but to get ahead of ourselves -- to break our own records, to outstrip our yesterday by our today."

"Music is a moral law. It gives soul to the universe, wings to the mind, flight to the imagination, a charm to sadness, and life to everything."

"We often think that when we have completed our study of one we know all about two, because 'two' is 'one and one.' We forget that we have still to make of a study of 'and.'"