I think I exist, therefore I exist. I think.

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

In the 20th century, we had a century where at the beginning of the century, most of the world was agricultural and industry was very primitive. At the end of that century, we had men in orbit, we had been to the moon, we had people with cell phones and colour televisions and the Internet and amazing medical technology of all kinds.

The problem with the gene pool is that there's no lifeguard.

To say that a writer's hold on reality is tenuous is an understatement-it's like saying the Titanic had a rough crossing. Writer's build their own realities, move into them and occasionally send letters home. The only difference between a writer and a crazy person is that a writer gets paid for it.

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 single most important lesson of effective communication is this: Focus on clarity. Concentrate on precisions. Don’t worry about constructing beautiful sentences. Beauty comes from meaning, not language. Accuracy is the most effective style of all.