I don't really like movies that are all one or the other. It's really about the play between both of them. Now that I've said that, there's actually lots of movies that I like that are one or the other but it's just not for me as a filmmaker.

I don't really think in terms of competing with myself.

It also is true that some ideas naturally work themselves out over a longer period of time than a single human life can encompass.

[T]he one indispensable ingredient of science fiction [is] a belief in a world being changed by man's intellect, a conviction that what was being written could really happen.

It's definitely not the character who it is in the comics, I'll say that much.

In hard-core science fiction in which characters are responding to a change in environment, caused by nature or the universe or technology, what readers want to see is how people cope, and so the character are present to cope, or fail to cope.

I hope I'm still alive to see an expedition set off for Mars.