Every problem that is interesting is also soluble.

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

Our best theories are not only truer than common sense, they make more sense than common sense...

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.

To me quantum computation is a new and deeper and better way to understand the laws of physics, and hence understanding physical reality as a whole.

The brain is the only kind of object capable of understanding that the cosmos is even there, or why there are infinitely many prime numbers, or that apples fall because of the curvature of space-time, or that obeying its own inborn instincts can be morally wrong, or that it itself exists.

Where we have good, testable explanations, they then have to be tested, and we drop the ones that fail the tests.