Everyone knew it was impossible, until a fool who didn't know came along and did it.
Imagination is greater than knowledge.
Nothing truly valuable arises from ambition or from a mere sense of duty; it stems rather from love and devotion towards men and towards objective things.
God is clever, but not dishonest.
Man can find meaning in life only through devoting himself to society.
A theory is the more impressive the greater is the simplicity of its premises, the more different are the kinds of things it relates and the more extended the range of its applicability.