Theories without facts may be barren, but facts without theories are meaningless.

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

All knowledge is gained through an orderly loss of information.

The concept of need is often looked upon rather unfavorably by economists, in contrast with the concept of demand. Both, however, have their own strengths and weaknesses. The need concept is criticized as being too mechanical, as denying the autonomy and individuality of the human person, and as implying that the human being is a machine which "needs" fuel in the shape of food, engine dope in the shape of medicine, and spare parts provided by the surgeon.

Economics, we learn in the history of thought, only became a science by escaping from the casuistry and moralizing of medieval thought.

Don't go to great trouble to optimize something that never should be done at all. Aim to enhance total systems properties, such as creativity, stability, diversity, resilience, and sustainability - whether they are easily measured or not.

Knowledge exists in minds, not in books. Before what has been found can be used by practitioners, someone must organize it, integrate it, extract the message.