And what we know, or think we know, about the universe of space and time is changing very quickly.

I guess if one set of my books was selling like Stephen King's, and the other wasn't selling at all, editors would want me to do the ones that sold like Stephen King's. But they seem to be willing to let me pick what I want to do next.

I wrote speculative fiction because I loved to read it, and thought I could do better than some of the people who were getting published.

I suspect that writer's block afflicts mainly people who have some stable and ample source of income outside of writing. So far it hasn't been a problem.

Research is of considerable importance in certain fields, such as science and history.

I have some good stories yet to tell.

If people ask me for the ingredients of success, I say one is talent, two is stubbornness or determination, and third is sheer luck. You have to have two out of the three. Any two will probably do.