Every genuine test of a theory is an attempt to falsify it, or to refute it.

I personally call the type of government which can be removed without violence 'democracy,' and the other, 'tyranny.'.

Thus science must begin with myths, and with the criticism of myths; neither with the collection of observations, nor with the invention of experiments, but with the critical discussion of myths, and of magical techniques and practices.

We do not know. We can only guess.

It is not possible to write clearly enough to avoid being misrepresented by people who are sufficiently determined to do so.

The influence (for good or ill) of Plato's work is immeasurable. Western thought, one might say, has been Platonic or anti-Platonic, but hardly ever non-Platonic.

No particular theory may ever be regarded as absolutely certain.... No scientific theory is sacrosanct.