We are operating at an overall mechanical efficiency of only four percent... Therefore, we find that if we increase the overall mechanical efficiency to only twelve percent we can take care of everybody. That three-fold increase in the overall efficiency can only be accomplished by redesign.

Now there is one outstanding important fact regarding spaceship earth, and that is that no instruction book came with it.

The nearest each of us can come to God is by loving the truth.

History's political and economic power structures have always abhorred 'idle people' as potential troublemakers. Yet nature never abhors seemingly idle trees, grass, snails, coral reefs, and clouds in the sky.

The most important thing about Spaceship Earth - an instruction book didn't come with it.

You cannot question an assumption you do not know you have made.

Humans beings always do the most intelligent thing…after they’ve tried every stupid alternative and none of them have worked