I don't believe any experiment until it is confirmed by theory. I find this is a witty inversion of "conventional" wisdom.

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

The word reality frightens me.

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

There was a time when we wanted to be told what an electron is. The question was never answered. No familiar conceptions can be woven around the electron; it belongs to the waiting list.

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

We often think that when we have completed our study of one we know all about two, because 'two' is 'one and one.' We forget that we still have to make a study of 'and.'