...people do not want to hear that aliens are just like us. They want wise angels and noble savages.

I fear we must use bad science to accomplish good politics.

Greatest stuff in the world. Superman’s duct tape.

Where the explorers go, conquerors and exploiters always follow.

Four limbs good, six limbs bad.

If I am to write my memoirs someday I would like to have good material to work with.

It is very difficult to predict what other humans will do, and considerably more difficult to anticipate the behaviour of aliens.

I prefer to be proved wrong than to live in error.