"In the long history of humankind (and animal kind, too) those who learned to collaborate and improvise most effectively have prevailed."

"Great is the power of steady misrepresentation."

"The more I see of the world, the more I am convinced of the fact that it is full of wonders."

"The mystery of the beginning of all things is insoluble by us; and I for one must be content to remain an agnostic."

"The greatest discovery of all time is that a person can change his future by merely changing his attitude."