Human subtlety will never devise an invention more beautiful, more simple or more direct than does nature because in her inventions nothing is lacking, and nothing is superfluous.
I have wasted my hours.
Time stays long enough for anyone who will use it.
Where there is shouting, there is no true knowledge.
Just as courage is the danger of life, so is fear its safeguard.
Tears come from the heart and not from the brain.