III. Man's Faculty of Cognition in the Etheric World

And finally with the ‘I’ itself we belong to a world that flows as from a quickening fount through worlds which, as for instance our own world, are threefold in character. The three members of our world are the physical, the etheric, the astral. The world of the ‘I’ passes through this world and through other similarly threefold worlds. It is therefore a far more embracing world, one that we must regard as eternal as compared with the temporal.