The exception tests the rule.

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

We absolutely must leave room for doubt or there is no progress and no learning. There is no learning without having to pose a question. And a question requires doubt. People search for certainty. But there is no certainty.

The only way to deep happiness is to do something you love to the best of your ability

What is the fundamental hypothesis of science, the fundamental philosophy? We stated it in the first chapter: the sole test of the validity of any idea is experiment. ... If we are told that the same experiment will always produce the same result, that is all very well, but if when we try it, it does not, then it does not. We just have to take what we see, and then formulate all the rest of our ideas in terms of our actual experience.

But the real glory of science is that we can find a way of thinking such that the law is evident.

Tell your son to stop trying to fill your head with science - for to fill your heart with love is enough!