The faster you go, the shorter you are.
This change in the conception of reality is the most profound and the most fruitful that physics has experienced since the time of Newton. Refering to James Clerk Maxwell's contributions to physics.
Love is a better teacher than duty.
If the bees disappear, man would have only four years of life left.
In my experience, the best creative work is never done when one is unhappy.
Is it not better for a man to die for a cause in which he believes, such as peace, than to suffer for a cause in which he does not believe, such as war?