Electrical force is defined as something which causes motion of electrical charge; an electrical charge is something which exerts electric force.

In any attempt to bridge the domains of experience belonging to the spiritual and physical sides of nature, time occupies the key position.

We are bits of stellar matter that got cold by accident, bits of a star gone wrong.

Something unknown is doing we don't know what-that is what our theory amounts to.

Science is one thing, wisdom is another. Science is an edged tool, with which men play like children, and cut their own fingers.

An ocean traveler has even more vividly the impression that the ocean is made of waves than that it is made of water.

Never accept a fact until it has been verified by theory.