Striving for social justice is the most valuable thing to do in life.
Man has an intense desire for assured knowledge.
Discussion and argument are essential parts of science; the greatest talent is the ability to strip a theory until the simple basic idea emerges with clarity.
External conditions can, to a certain extent, reduce, but never cancel individual repsonsibility.
It is the theory that decides what can be observed.
What physics looks for: The simplest possible system of thought which will bind together the observed facts.