When humans act like animals, they become the most dangerous of animals to themselves and other humans, and this is because of another critical difference between humans and animals: Whereas animals are usually restrained by the limits of physical appetites, humans have mental appetites that can be far more gross and capacious than physical ones. Only humans squander and hoard, murder and pillage because of notions.

There are, it seems, two muses: The Muse of Inspiration, who gives us inarticulate visions and desires, and the Muse of Realization, who returns again and again to say, 'It is yet more difficult than you thought.' It may be that when we no longer know what to do, we have come to our real work and when we no longer know which way to go, we have begun our real journey.

A man with a machine and inadequate culture is a pestilence.

The uplands of my home country in north central Kentucky are sloping and easily eroded, dependent for safekeeping upon year-round cover of perennial plants.

We could say that the human race is a great coauthorship in which we are collaborating with God and nature in the making of ourselves and one another. From this there is no escape. We may collaborate either well or poorly or we may refuse to collaborate, but even to refuse to collaborate is to exert an influence and to affect the quality of the product. This is only a way of saying that by ourselves we have no meaning and no dignity; by ourselves we are outside the human definition, outside our identity.

The teachers are everywhere. What is wanted is a learner.

Our destruction of nature is not just bad stewardship, or stupid economics, or a betrayal of family responsibility; it is the most horrid blasphemy. It is flinging God's gifts into His face, as if they were of no worth beyond that assigned to them by our destruction of them.