We realize the indivisibility of the earth - its soil, mountains, rivers, forests, climate, plants, and animals - and respect it collectively not only as a useful servant but as a living being, vastly less alive than ourselves in degree, but vastly greater than ourselves in time and space - a being that was old when the morning stars sang together, and when the last of us has been gathered unto his fathers, will still be young.

...to any one for whom wild things are something more than a pleasant diversion, (conservation) constitutes one of the milestones in moral evolution.

There are some who can live without wild things and some who cannot.

I am glad I will not be young in a future without wilderness.

Wilderness is a resource which can shrink but not grow... the creation of new wilderness in the full sense of the word is impossible.

To keep every cog and wheel is the first precaution of intelligent tinkering.

In June as many as a dozen species may burst their buds on a single day. No man can heed all of these anniversaries; no man can ignore all of them.