If we can't program it, we can't understand it.

I myself believe that there will one day be time travel because when we find that something isn't forbidden by the over-arching laws of physics we usually eventually find a technological way of doing it.

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

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

Base metals can be transmuted into gold by stars, and by intelligent beings who understand the processes that power stars, but by nothing else in the universe.

Is the human race a universal constructor?

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.