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

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

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.

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

Discovering a new explanation is inherently an act of creativity.

Humans may or may not have cosmic significance, and if they do, it will be by hitching a ride on the objective centrality of knowledge in the cosmic scheme of things.

It is possible to build a virtual-reality generator whose repertoire includes every possible environment.