Nothing of any importance can be taught. It can only be learned, and with blood and sweat.

Certitude belongs exclusively to those who only look in one encyclopedia.

I look forward without dogmatic optimism but without dread.

...an optimistic mind-set finds dozens of possible solutions for every problem that the pessimist regards as incurable.

We can't run out of resources. Resources exist when the human mind sees how to use something.

I regard morality and ideology as the chief cause of human misery.

If the oncoming mutation to interstellar immortality is screwed up by the politicians, it will be because those of us who see the opportunities in modern science are not adroit enough to outmaneuver the forces of inertia, stupidity and greed. Well, if we're not intelligent enough to overcome such obstacles, then we don't deserve to carry off the mutation at this stage of evolution.