No Trilogy Should Have More Than Four

A Precondition For Being A Science Fiction Writer Other Than An Interest In The Future Is That, An Interest - At Least An Understanding Of Science, Not Necessarily A Science Degree But You Must Have A Feeling For The Science And Its Possibilities And Its Impossibilities, Otherwise You're Writing Fantasy. Now, Fantasy Is Also Fine, But There Is A Distinction, Although No One's Ever Been Able To Say Just Where The Dividing Lines Come.

The Only Way To Define Your Limits Is By Going Beyond Them.

We Seldom Stop To Think That We Are Still Creatures Of The Sea, Able To Leave It Only Because, From Birth To Death, We Wear The Water-filled Space Suits Of Our Skins.

It Was The Mark Of A Barbarian To Destroy Something One Could Not Understand.

In The Long Run, There Are No Secrets. In Science. The Universe Will Not Cooperate In A Cover-up.