The human condition can almost be summed up in the observation that, whereas all experiences are of the past, all decisions are about the future. It is the great task of human knowledge to bridge this gap and to find those patterns in the past which can be projected into the future as realistic images.

It is almost as hard to define mathematics as it is to define economics, and one is tempted to fall back on the famous old definition attributed to Jacob Viner, "Economics is what economists do," and say that mathematics is what mathematicians do. A large part of mathematics deals with the formal relations of quantities or numbers.

Deciding under uncertainty is bad enough, but deciding under an illusion of certainty is catastrophic.

The illusion that consumption - and its correlative, income - is desirable probably stems from too great preoccupation with what Knight calls "one-use goods," such as food and fuel, where the utilization and consumption of the good are tightly bound together in a single act or event. ... any economy in the consumption of fuel that enables us to maintain warmth or to generate power with lessened consumption again leaves us better off. ... there is no great value in consumption itself.

The right to have children should be a marketable commodity, bought and traded by individuals but absolutely limited by the state.

[There will be movement toward] behavioral economics... [which] involves study of those aspects of men's images, or cognitive and affective structures that are more relevant to economic decisions.

Are we to regard the world of nature simply as a storehouse to be robbed for the immediate benefit of man? ... Does man have any responsibility for the preservation of a decent balance in nature, for the preservation of rare species, or even for the indefinite continuance of his race?