disposition of action. The words "environment," "medium" denote
something more than surroundings which encompass an individual.
They denote the specific continuity of the surroundings with his
own active tendencies. An inanimate being is, of course,
continuous with its surroundings; but the environing
circumstances do not, save metaphorically, constitute an
environment. For the inorganic being is not concerned in the
influences which affect it. On the other hand, some things which
are remote in space and time from a living creature, especially a
human creature, may form his environment even more truly than
some of the things close to him. The things with which a man
varies are his genuine environment. Thus the activities of the
astronomer vary with the stars at which he gazes or about which
he calculates. Of his immediate surroundings, his telescope is
most intimately his environment. The environment of an
antiquarian, as an antiquarian, consists of the remote epoch of
human life with which he is concerned, and the relics,
inscriptions, etc., by which he establishes connections with that
period.

In brief, the environment consists of those conditions that
promote or hinder, stimulate or inhibit, the characteristic
activities of a living being. Water is the environment of a fish
because it is necessary to the fish's activities -- to its life.
The north pole is a significant element in the environment of an
arctic explorer, whether he succeeds in reaching it or not,
because it defines his activities, makes them what they
distinctively are. Just because life signifies not bare passive
existence (supposing there is such a thing), but a way of acting,
environment or medium signifies what enters into this activity as