by Benton MacKaye
Environment is outward influence. It is defined as "the sum of the influences which affect an organism from without." It appears to be extrinsic rather than intrinsic. It belongs to what we call the "outer world," which appears to be different from the "inner mind." But what else is the outer world but an extension of the inner mind? It is certainly a form of life in which every inner life takes share. Environment is the influence upon each inner mind of the thing shared by every inner mind: it is the common layer of air which we all breathe -- the filament which binds our separate lives. "Look out and not in," we are told, for when we look out we thereby look in -- to our fellow souls on earth. Environment, therefore, provides a sort of common mind -- the total life which every life must share: it is the least common denominator of our inner selves.
"All the world's a stage and all the men and women merely players."