Mathematics brought rigor to Economics. Unfortunately, it also brought mortis.

The love of God again makes us free, for it draws us to set a low value on those things wherein we are subject to others - our wealth, our position, our reputation, and our life - and to set a high value on those things which no man can take from us - our integrity, our righteousness, our love for all men, and our communion with God.

The World is a very complex system. It is easy to have too simple a view of it, and it is easy to do harm and to make things worse under the impulse to do good and make things better.

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

Production functions involving only land, labor and capital... never work and never explain economic development.

The organization of science into disciplines sets up a series of ghettos with remarkable distances of artificial social space between them.

In calling society an ecological system we are not merely using an analogy; society is an example of the general concept of an "ecosystem" that is, an ecological system of which biological systems - forests, fields, swamps - are other examples.