The best thing that can happen to a human being us to find a problem, to fall in love with that problem, and to live trying to solve that problem, unless another problem even more lovable appears.

Now this principle of induction cannot be a purely logical truth like a tautology or an analytic statement. . . .

I see now more clearly than ever before that even our greatest troubles spring from something that is [as] admirable and sound as it is dangerous – from our impatience to better the lot of our fellows.

There is no pure, disinterested, theory-free observation.

It must be possible for an empirical system to be refuted by experience.

A system is empirical or scientific only if it is capable of being tested by experience. These considerations suggest that not the verifiability but the falsifiability of a system is to be taken as a criterion of demarcation... It must be possible for an empirical or scientific system to be refuted by experience.

Science must begin with myths, and with the criticism of myths.