Peace cannot be kept by force. It can only be achieved by understanding.
Invention is not the product of logical thought, even though the final product is tied to a logical structure.
I am very smart. But not as strong-hearted as all the workers on earth for he toils endlessly and does it all to feed his family while I do it merely for solving an impossible puzzle.
You cannot simultaneously prevent and prepare for war.
Words are and remain an empty sound, and the road to perdition has ever been accompanied by lip service to an ideal.
Unthinking respect for authority is the greatest enemy of truth.
The majority of the stupid is invincible and guaranteed for all time. The terror of their tyranny, however, is alleviated by their lack of consistency.
Strive not to be a success, but rather to be of value.
Standardization robs life of its spice.
Science can flourish only in an atmosphere of free speech.
Nothing will benefit human health and increase chances for survival of life on Earth as much as the evolution to a vegetarian diet.
Never do anything against conscience even if the state demands it.