In order to shake a hypothesis, it is sometimes not necessary to do anything more than push it as far as it will go.

It is theory that decides what can be observed.

Socrates thought and so do I that the wisest theory about the gods is no theory at all.

One must credit an hypothesis with all that has had to be discovered in order to demolish it.

The scientific theory I like best is that the rings of Saturn are composed entirely of lost airline baggage.

Let us work without theorizing, 'Tis the only way to make life endurable.