Work as hard and as much as you want to on the things you like to do the best.

Science is what we do to keep us from lying to ourselves

Scientific knowledge is a body of statements of varying degrees of certainty -- some most unsure, some nearly sure, none absolutely certain.

The whole question of imagination in science is often misunderstood by people in other disciplines. ... They overlook the fact that whatever we are allowed to imagine in science must be consistent with everything else we know.

The female mind is capable of understanding analytic geometry... The difficulty may just be that we have never yet discovered a way to communicate with the female mind. If it is done in the right way, you may be able to get something out of it.

Observation, reason, and experiment make up what we call the scientific method.

If we will only allow that, as we progress, we remain unsure, we will leave opportunities for alternatives.