The West needs to relearn what the rest of the world has never forgotten - that there is nothing sinful in leisure as long as it does not degenerate into mere sloth.

Any technology distinguishable from magic is insufficiently advanced.

If there are any gods whose chief concern is man, they can't be very important gods.

In all the universe there is nothing more precious than mind.

I have never grown up, but I will never stop growing.

Don't mess up the environment until you're quite sure what you're doing.

The realisation that our small planet is only one of many worlds gives mankind the perspective it needs to realise sooner that our own world belongs to all its creatures.