"What Christ is to the world is the ego to Man. His ego is a part of Christ, out of his ego all powers emerge; but in order for them to grow and increase, they have to come together again and again in their ego. This confluence of the human powers in the ego happens in the intervals between the incarnations. Then the forces unfolded during a human life gather and consolidate, to emerge more intensified in a new incarnation. But when a person reaches a higher level of development, he learns more and more to carry out this process consciously during his earthly life. He consciously develops his powers in the service of the world, and he consciously transmits the experiences thus made to his ego, to the center of his being. They are then already implanted in the ego during earth life; He thereby presupposes the work of many years of intermediate time between his incarnations, where this gathering of the unfolded forces in the ego occurs through the help of higher beings.
As soon as man begins to consciously gather and develop forces in this way during his life, his spirit grows in the spiritual world, and he transforms more and more his whole being into an immortal one. For what he himself incorporates into his being, remains to him as a lasting part of his being. "( Lit .: GA 91, p. 255f )
"We must be clear that we have the spiritual-spiritual essence that we summarize in its center, when we say" I "or" I. "This spiritual-spiritual essence is embedded in the astral, Etheric and physical body. Just as man now lives in the world, when we live inwardly we actually live in our ego, for all the activities of the soul are in some way connected with the ego in the waking man, and all appear on the same Background of the ego. " ( Ref .: GA 143, p. 49f )
Through its three lower essential elements, which are as it were given to man in a natural way, man is a creature of the divine spiritual world just like all other earthly beings. Through his ego he is called to become the creator of himself, indeed, more than that, he can only realize himself by creating himself. The ego develops in the course of repeated earthly lives , which also determine its destiny ( karma ).
In order for the ego to be able to intervene in the bodily sheaths, the ego-bearer , which is the external bodily expression for the ego, is needed. The ego-wearer appears to the clairvoyant in the human aura as a somewhat oblong bluish ball at the root of the nose behind the forehead.
A destructive hearth inside man is the prerequisite for the ego to develop and consolidate. If these forces, which are normally inaccessible to consciousness because they are below the memory level, then become the source of evil. On the other hand, all the moral forces that we develop here are already fertile germs for the future existence of Jupiter ( Ref : GA 207, p. 21ff ).
Quotes from Rudolf Steiner