The brain is the highest of the organs in position, and it is protected by the vault of the head; it has no flesh or blood or refuse. It is the citadel of sense-perception.
How many things... are looked upon as quite impossible until they have been actually effected?
Nature is to be found in her entirety nowhere more than in her smallest creatures.
Nature has given man no better thing than shortness of life.
Our civilization depends largely on paper.
The only certainty is uncertainty