We are destroying the wilderness of the planet at the exact rate, and to the same extent, that we are suppressing the wildness of our own psyches. The human being and the natural environment are inseparable: what we do to one we also do to the other.
There are many things that are optional, even superfluous, to my life, but the one thing that is non-negotiable is my connection to the wild vitality that I consider to be the fundamental power of the conscious universe.