We don't know how to use energy or what to use it for. And we cannot restrain ourselves. Our time is characterized as much by the abuse and waste of human energy as it is by the abuse and waste of fossil fuel energy.

To the extent that we consume, in our present circumstances, we are guilty. To the extent that we guilty consumers are conservationists, we are absurd. But what can we do? Must we go on writing letters to politicians and donating to conservation organizations until the majority of our fellow citizens agree with us? Or can we do something directly to solve our share of the problem? I am a conservationist. I believe wholeheartedly in putting pressure on the politicians and in maintaining the conservation organizations.

A sustainable agriculture is one which depletes neither the people nor the land.

Young lovers see a vision of the world redeemed by love. That is the truest thing they ever see, for without it life is death.

A liberal education rests on the assumption that nature and human nature do not change very much or very fast and that one therefore needs to understand the past.

In this state of total consumerism-which is to say a state of helpless dependence on things and services and ideas and motives that we have forgotten how to provide ourselves-all meaningful contact between ourselves and the earth is broken. We do not understand the earth in terms either of what it offers us or of what it requires of us, and I think it is the rule that people inevitably destroy what they do not understand.

What can't be helped must be endured.