We must do what we conceive to be the right thing, and not bother our heads or burden our souls with whether we are going to be successful. Because if we don't do the right thing, we'll be doing the wrong thing, and we will just be part of the disease, and not a part of the cure.

Many have no desire to be in it, because their work does not interest them, providing them with neither challenge nor satisfaction, and has no other merit in their eyes than that it leads to a pay-packet at the end of the week.

The generosity of the Earth allows us to feed all mankind; we know enough about ecology to keep the Earth a healthy place; there is enough room on the Earth, and there are enough materials, so that everybody can have adequate shelter; we are quite competent enough to produce sufficient supplies of necessities so that no one need live in misery.

Much of the economic decay of southeast Asia (as of many other parts of the world) is undoubtedly due to a heedless and shameful neglect of trees.

Anyone who thinks consumption can expand forever on a finite planet is either insane or an economist.

Never let an inventor run a company. You can never get him to stop tinkering and bring something to market

The modern world tends to be skeptical about everything that makes demands on man's higher faculties. But it is not at all skeptical about skepticism, which demands hardly anything.