I haven't bookmarked any quotes at the moment.
The important thing is not to stop questioning. Curiosity has its own reason for existing. One cannot help but be in awe when he contemplates the mysteries of eternity, of life, of the marvelous structure of reality. It is enough if one tries merely to comprehend a little of this mystery everyday. Never lose a holy curiosity.
But wait... my book has more:
Progress is impossible without change, and those who cannot change their minds cannot change anything.
Women wish to be loved not because they are pretty, or good, or well bred, or graceful, or intelligent, but because they are themselves.
Bad people are less a problem than indifferent people.
Look at things... as they can be.