The physical world is entirely abstract and without actuality apart from its linkage to consciousness.

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

Schrödinger's wave-mechanics is not a physical theory, but a dodge - and a very good dodge too.

You cannot disturb the tiniest petal of a flower without the troubling of a distant star.

The word reality frightens me.

What is possible in the Cavendish Laboratory may not be too difficult in the sun.

For the truth of the conclusions of physical science, observation is the supreme Court of Appeal.