We still do not know one thousandth of one percent of what nature has revealed to us.

Animals are my friends… and I don’t eat my friends.

Nature’s laws affirm instead of prohibit. If you violate her laws you are your own prosecuting attorney, judge, jury, and hangman.

The magnificence of mountains, the serenity of nature – nothing is safe from the idiot marks of man’s passing.

The human race will be the cancer of the planet.

When a man wantonly destroys one of the works of man we call him a vandal. When he destroys one of the works of god we call him a sportsman.

When one tugs at a single thing in nature, he finds it attached to the rest of the world.

We have to shift our emphasis from economic efficiency and materialism towards a sustainable quality of life and to healing of our society, of our people and our ecological systems.

Man is a blind, witless, low brow, anthropocentric clod who inflicts lesions upon the earth.

Malthus has been buried many times, and Malthusian scarcity with him. But as Garrett Hardin remarked, anyone who has to be reburied so often cannot be entirely dead.

It appears to be a law that you cannot have a deep sympathy with both man and nature.

When you use a manual push mower, you’re “cutting” down on pollution and the only thing in danger of running out of gas is you!

Man is a complex being: he makes deserts bloom – and lakes die.

The control man has secured over nature has far outrun his control over himself.

The activist is not the man who says the river is dirty. The activist is the man who cleans up the river.

In its broadest ecological context, economic development is the development of more intensive ways of exploiting the natural environment.

For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.

Why should man expect his prayer for mercy to be heard by What is above him when he shows no mercy to what is under him?

We must be certain that the repair to the environment is sufficient to allow wild species to recover and survive.

The more we exploit nature, The more our options are reduced, until we have only one: to fight for survival.

Our modern industrial economy takes a mountain covered with trees, lakes, running streams and transforms it into a mountain of junk, garbage, slime pits, and debris.

Waste not the smallest thing created, for grains of sand make mountains, and atomies infinity.

Understanding the laws of nature does not mean that we are immune to their operations.

Humankind has not woven the web of life. We are but one thread within it. Whatever we do to the web, we do to ourselves. All things are bound together. All things connect.

Man must feel the earth to know himself and recognize his values…. God made life simple. It is man who complicates it.