We find no sense in talking about something unless we specify how we measure it; a definition by the method of measuring a quantity is the one sure way of avoiding talking nonsense.

Religion divides us, while it is our human characteristics that bind us to each other.

[Science doesn't deal with facts; indeed] fact is an emotion-loaded word for which there is little place in scientific debate.

Time is that which is manufactured by clocks.

A theory is scientific only if it can be disproved. But the moment you try to cover absolutely everything the chances are that you cover nothing.

An observer situated in a nebula and moving with the nebula will observe the same properties of the universe as any other similarly situated observer at any time.

... an opportunity to allow the bees in one's bonnet to buzz even more noisily than usual.

[Newton's calculations] entered the marrow of what we know without knowing how we know it.

Our humanist attitude should therefore throughout be to stress what we all have in common with each other and relegate quarrelsome religion to the private domain where it can do [less] harm.

When you lose yourself in a book the hours grow wings and fly.

Noise in the form of words'

Every Mother contains her daughter in herself and every daughter her mother and every mother extends backwards into her mother and forwards into her daughter.

Without proper foundations, there can be no fashion.

I'm proud to say I've never been anybody's lapdog.

Question: If there were two of you which one would win?

Every one regards his duty as a troublesome master from whom he would like to be free.

I'm married to my best friend!

This made him a grad student, and grad students existed not to learn things but to relieve the tenured faculty members of tiresome burdens such as educating people and doing research.