Each ray of light moves in the coordinate system 'at rest' with the definite, constant velocity V independent of whether this ray of light is emitted by a body at rest or a body in motion.

A life directed chiefly toward the fulfillment of personal desires will sooner or later always lead to bitter disappointment.

Nobody knows how the stand of our knowledge about the atom would be without him. Personally, [Niels] Bohr is one of the amiable colleagues I have met. He utters his opinions like one perpetually groping and never like one who believes himself to be in possession of the truth.

The grand aim of all science is to cover the greatest number of empirical facts by logical deduction from the smallest number of hypotheses or axioms.

I want to know God's thoughts.

You are right in speaking of the moral foundations of science, but you cannot turn around and speak of the scientific foundations of morality.

Mere unbelief in a personal God is no philosophy at all.