My approach to 'Star Trek' was, 'I know science fiction, and I know screen writing.' That was very arrogant of me, but you really need to be a little bit arrogant to think that what you have to say is good enough to justify the expense of hundreds of thousands - now millions of dollars - to make an episode of the TV show.

The fifties are a peaceful time, a quiet sleeping time between two noisy bursts of years, a blue and white time filled with sweet yellow days, music and bright smelling memories.

Who are we? And to me that's the essential question that's always been in science fiction. A lot of science fiction stories are - at their very best - evocations of that question. When we look up at the night sky and wonder, "Is there anyone else out there?" we're also asking who we are we in relation to them.

I had always been fascinated by the whole idea that Australia was this different ecology and that when rabbits and prickly pears and other things from Europe were introduced into Australia, they ran amok.

Adolescence is that time in your life when you discover your ability to be depressed.

A work of art is an act of love. Critics are crab lice.

Contentment is the continuing act of accepting the process of your own life.