Physics is not about how the world is, it is about what we can say about the world - Niels Bohr

There are some things so serious that you have to laugh at them.

Physics is to be regarded not so much as the study of something a priori given, but rather as the development of methods of ordering and surveying human experience. In this respect our task must be to account for such experience in a manner independent of individual subjective judgement and therefore objective in the sense that it can be unambiguously communicated in ordinary human language.

An expert is a person who has found out by his own painful experience all the mistakes that one can make in a very narrow field.