A computation is a process that obeys finitely describable rules.

Intellectually, perspective [drawing] is a breakthrough, because here, for the first time, the physical space we live in is being depicted as ifit were an abstract, mathematical space. A less obvious innovation due to perspective is that here, for the first time, people are actually drawing pictures of infinities.

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

The hard fact is that not everyone does get published.

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.

It's tedious to watch something very obvious being worked out, like a movie that's not particularly good and after about half an hour you know how it's going to end.

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?