The Earth . . . which is not in motion like objective bodies, but not at rest either, since we cannot see what it could be "tacked on" to . . . is the "soil" or "stem" of our thought as it is of life. We shall certainly be able to move it or carry it back when we inhabit other planets, but the reason we shall is that then we shall have enlarged our native soil. We cannot do away with it. As the Earth is by definition one, all soil we tread upon becoming simultaneously a province of it, the living beings with whom the sons of the Earth will be able to communicate will simultaneously become meaner if you prefer, terrestrial men will become variants of a more general human community which will remain one. The Earth is the matrix of our time as it is of our space. Every constructed notion of time presupposes our proto-history as carnal being co-present to a single world. Every evocation of possible worlds refers to a way of seeing our own world. Every possibility is a variant of our reality, an effective possibility of reality. . . .