The truly privileged theories are not the ones referring to any particular scale of size or complexity, nor the ones situated at any particular level of the predictive hierarchy - but the ones that contain the deepest explanations.

Science is objective. And in my view we cannot take any experimental results seriously except in the light of good explanations of them.

Every problem that is interesting is also soluble.

The overwhelming majority of theories are rejected because they contain bad explanations, not because they fail experimental tests.

Despite the unrivaled empirical success of quantum theory, the very suggestion that it may be literally true as a description of nature is still greeted with cynicism, incomprehension, and even anger.

Time travel may be achieved one day, or it may not. But if it is, it should not require any fundamental change in world-view, at least for those who broadly share the world view I am presenting in this book.

Feeling insignificant because the universe is large has exactly the same logic as feeling inadequate for not being a cow.