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Nature is relentless and unchangeable, and it is indifferent as to whether its hidden reasons and actions are understandable to man or not.

A long time ago, I became aware that many of us have a tendency to lump nature into simplistic categories, such as what we consider beautiful or ugly, important or unimportant. As human a thing as that is to do, I think it often leads us to misunderstand the respective roles of life forms and their interconnectedness.

Nature hasn't gone anywhere. It is all around us, all the planets, galaxies and so on. We are nothing in comparison.

Nowhere more truly than in his mental capacities is man a part of nature.

The further human society drifts away from nature, the less we understand interdependence.

We have spoken of beings so low in the scale that the individuals throughout their whole existence are not sufficiently specialized to be distinctively plant or animal: yet these are definite life in simpler shape.

If nature were not beautiful, it would not be worth knowing, and if nature were not worth knowing, life would not be worth living.

I love not man the less, but Nature more.

What constitutes a real, live human being is more of a mystery than ever these days, and men each one of whom is a valuable, unique experiment on the part of nature are shot down wholesale.

Man is nature's sole mistake.