Howard Zahniser quotes:

A wilderness, in contrast with those areas where man and his own works dominate the landscape, is hereby recognized as an area where the earth and its community of life are untrammeled by man, where man himself is a visitor who does not remain.

By very definition this wilderness is a need. The idea of wilderness as an area without man's influence is man's own concept. Its values are human values. Its preservation is a purpose that arises out of man's own sense of his fundamental needs

I believe we have a profound fundamental need for areas of the earth where we stand without our mechanisms that make us immediate masters over our environment.

The wilderness that has come to us out of the eternity of the past, we have the boldness to project into the eternity of the future.

We deeply need the humility to know ourselves as the dependent members of a great community of life, and this can indeed be one of the spiritual benefits of a wilderness experience. ... [T]o know the wilderness is to know a profound humility, to recognize one's littleness, to sense dependence and interdependence, indebtedness and responsibility.

We must remember always that the essential quality of the wilderness is its wildness,