When the soul experiences itself in its astral body and has living thought-beings as its environment, it knows itself to be outside both the physical and etheric bodies. But it also feels that its thinking, feeling, and willing belong but to a limited sphere of the universe, whereas in virtue of its own original nature it should embrace much more than is allotted to it in that sphere. The soul that has become clairvoyant may say to itself within the spiritual world: “In the physical world I am confined to what my physical body allows me to observe; in the elemental world I am limited by my etheric body; in the spiritual world I am restricted by finding myself, as it were, upon an island in the universe and by feeling my spiritual existence bounded by the shores of that island. Beyond them is a world which I should be able to perceive if I were to work my way through the veil which is woven before the eyes of my spirit by the actions of living thought-beings.” Now the soul is indeed able to work its way through this veil, if it continues to develop further and further the faculty of self surrender which is already necessary for its life in the elemental world. It is under the necessity of still further strengthening the forces which accrue to it from experience in the physical world, in order to be guarded in supersensible worlds from having its consciousness deadened, clouded, or even annihilated. In the physical world the soul, in order to experience thoughts within itself, has need only of the strength naturally allotted to it apart from its own inner work. In the elemental world thoughts, which immediately on arising fall into oblivion, are softened down to dreamlike experience, i.e. do not come into the consciousness at all, unless the soul, before entering this world, has worked on the strengthening of its inner life. For this purpose it must specially strengthen the will-power, for in the elemental world a thought is no longer merely a thought; it has an inner activity, or life of its own. It has to be held fast by the will if it is not to leave the circle of the consciousness. In the spiritual world thoughts are completely independent living beings. If they are to remain in the consciousness, the soul must be so strengthened that it develops within itself and of itself the force which the physical body develops for it in the physical world, and which in the elemental world is developed by the sympathies and antipathies of the etheric body. It must forgo all this assistance in the spiritual world. There the experiences of the physical world and the elemental world are only present to the soul as memories. And the soul itself is beyond those two worlds. Around it is the spiritual world. This world at first makes no impression upon the astral body. The soul has to learn to live by itself on its own memories. The content of its consciousness is at first merely this: “I have existed, and now I am confronting nothingness.” But when the memories come from such soul-experiences as arc not merely reproductions of physical or elemental occurrences, but represent free thought-experiences induced by those occurrences, there begins in the soul an exchange of thought between the memories and the supposed nothingness of the spiritual environment. And that which arises as the result of that intercourse becomes a world of conceptions in the consciousness of the astral body. The strength which is needful for the soul at this point of its development is such as will make it capable of standing on the shore of the only world hitherto known to it, and of enduring the facing of supposed nothingness. This supposed nothingness is at first an absolutely real nothingness to the soul. Yet the soul still has, so to speak, behind it the world of its memories. It can, as it were, take a firm grip of them. It can live in them. And the more it lives in them, the more it strengthens the forces of the astral body. With this strengthening begins the intercourse between its past existence and the beings of the spiritual world. During this intercourse the soul learns to feel itself as an astral being. To use an expression in keeping with ancient traditions, we may say, “The human soul experiences itself as an astral being within the cosmic Word.” By the cosmic Word are here meant the thought-deeds of living thought-beings, which are enacted in the spiritual world like a living discourse of spirits; but in such a way that the discourse exactly corresponds in the spiritual world to deeds in the physical world.
If the soul now wishes to step over into the super-spiritual world, it must efface, by its own will, its memories of the physical and elemental worlds. It can only do this when it has gained the certainty, from the spirit discourse, that it will not wholly lose its existence if it effaces everything in itself which so far the consciousness of that existence has given it. The soul must actually place itself at the edge of a spiritual abyss and there make an act of wiII to forget its willing, feeling, and thinking. It must consciously renounce its past. The resolution that has to be taken at this point may be called a bringing about of complete sleep of the consciousness by one's own will, not by conditions of the physical or etheric body. Only this resolution must not be thought of as having for its object a return, after an interval of unconsciousness, to the same consciousness that was previously there, but as if that consciousness, by means of the resolution, really plunges into forgetfulness by its own act of will. It must be borne in mind that this process is not possible in either the physical or the elemental world, but only in the spiritual world. In the physical world the annihilation which appears as death is possible; in the elemental world there is no death. Man, in so far as he belongs to the elemental world, cannot die; he can only be transformed into another being. In the spiritual world, however, no positive transformation, in the strict sense of the word, is possible; for into whatever a human being may change, his past experience is revealed in the spiritual world as his own conscious existence. If this memory existence is to disappear within the spiritual world, it must be because the soul itself, by an act of will, has caused it to sink into oblivion. Clairvoyant consciousness is able to perform such an act of will when it has won the necessary inner strength. If it arrives at this, there emerges from the forgetfulness it has itself brought about the real nature of the ego. The super-spiritual environment gives the human soul the knowledge of that real ego. Just as clairvoyant consciousness can experience itself in the etheric and astral bodies, so too can it experience itself in the real ego.
This real ego is not created by clairvoyance; it exists in the depths of every human soul. Clairvoyant consciousness simply experiences consciously a fact appertaining to the nature of every human soul, of which it is not conscious.
After physical death man gradually lives himself into his spiritual environment. At first his being emerges into it with memories of the physical world. Then, although he has not the assistance of his physical body, he can nevertheless live consciously in those memories, because the living thought-beings corresponding to them incorporate themselves into the memories, so that the latter no longer have the merely shadowy existence peculiar to them in the physical world. And at a definite point of time between death and rebirth, the living thought-beings of the spiritual environment exert such a strong influence that, without any act of will, the oblivion which has been described is brought about. And at that moment life emerges in the real ego. Clairvoyant consciousness, by strengthening the life of the soul, brings about as a free action of the spirit that which is, so to speak, a natural occurrence between death and rebirth. Nevertheless, memory of previous earth-lives can never arise within physical experience, unless the thoughts have, during those earth-lives, been directed to the spiritual world. It is always necessary first to have known of a thing in order that a clearly recognisable remembrance of it may arise later. Therefore we must, during one earth-life, gain knowledge of ourselves as spiritual beings if we are to be justified in expecting that in our next earthly existence we shall be able to remember a former one.
Yet this knowledge need not necessarily be gained through clairvoyance. When a person acquires a direct knowledge of the spiritual world through clairvoyance, there may arise in his soul, during the earth-lives following the one in which he gained that knowledge, a memory of the former one, in the same way in which the memory of a personal experience presents itself in physical existence. In the case, however, of one who penetrates into spiritual science with true comprehension, through without clairvoyance, the memory will occur in such a form that it may be compared with the remembrance in physical existence of an event of which he has only heard a description.