You cannot conquer a free man. The most you can do is kill him.
Anything that gives us new knowledge gives us an opportunity to be more rational.
It is no small art to sleep: for that purpose you must keep awake all day.
Ask the right questions, and nature will open the doors to her secrets.
Educating the mind without educating the heart is no education at all.
If you are going through hell, keep going.
People who are more rational don’t perceive emotion less, they just regulate it better.
The educated differ from the uneducated as much as the living differ from the dead.
I strongly believe that fundamental science cannot be driven by instructional, industrial and government or military pressures.