A computation is a process that obeys finitely describable rules.

The churning of a human mind is unpredictable, as is the anatomy of the human heart.

What is the shape of space? Is it flat, or is it bent? Is it nicely laid out, or is it warped and shrunken? Is it finite, or is it infinite? Which of the following does space resemble more: (a) a sheet of paper, (b) an endless desert, (c) a soap bubble, (d) a doughnut, (e) an Escher drawing, (f) an ice cream cone, (g) the branches of a tree, or (h) a human body?

I am, as it were, an eye that the cosmos uses to look at itself. The Mind is not mine alone; the Mind is everywhere.

Science fiction writers put characters into a world with arbitrary rules and work out what happens.

Selling a book or story has never become absolutely automatic for me.

One of the nice things about science fiction is that it lets us carry out thought experiments.