18. Things seen have as their property manifestation, action, inertia. They form the basis of the elements and the sense-powers. They make for experience and for liberation. Here is a whole philosophy of life. Things seen, the total of the phenomena, possess as their property, manifestation, action, inertia: the qualities of force and matter in combination. These, in their grosser form, make the material world; in their finer, more subjective form, they make the psychical world, the world of sense-impressions and mind-images. And through this totality of the phenomenal, the soul gains experience, and is prepared for liberation. In other words, the whole outer world exists for the purposes of the soul, and finds in this its true reason for being. 19. The grades or layers of the Three Potencies are the defined, the undefined, that with distinctive mark, that without distinctive mark. Or, as we might say, there are two strata of the physical, and two strata of the psychical realms. In each, there is the side of form, and the side of force. The form side of the physical is here called the defined. The force side of the physical is the undefined, that which has no boundaries. So in the psychical; there is the form side; that with distinctive marks, such as the characteristic features of mind-images; and there is the force side, without distinctive marks, such as the forces of desire or fear, which may flow now to this mind-image, now to that. 20. The Seer is pure vision. Though pure, he looks out through the vesture of the mind. The Seer, as always, is the spiritual man whose deepest consciousness is pure vision, the pure life of the eternal. But the spiritual man, as yet unseeing in his proper person, looks out on the world through the eyes of the psychical man, by whom he is enfolded and enmeshed. The task is, to set this prisoner free, to clear the dust of ages from this buried temple. 21. The very essence of things seen is, that they exist for the Seer. The things of outer life, not only material things, but the psychic man also, exist in very deed for the purposes of the Seer, the Soul, the spiritual man Disaster comes, when the psychical man sets up, so to speak, on his own account, trying to live for himself alone, and taking material things to solace his loneliness. 22. Though fallen away from him who has reached the goal, things seen have not alto fallen away, since they still exist for others.