The span from the Baptism in the Jordan to Golgotha, when Steiner held the Christ-Being lived in the body of Jesus of Nazareth.
The Three Years are the period in Rudolf Steiner's Christology stretching from the Baptism in the Jordan to the Mystery of Golgotha, the years 30 to 33 of the era. At the Baptism the human Ego of Jesus of Nazareth withdrew, and the Christ-Being entered the physical, etheric, and astral bodies it left behind. For those three years one organism on Earth carried a cosmic being in place of a personal human Ego.
In Steiner's Own Words
We will inscribe firmly in our souls this four-fold nature of Christ Jesus, saying to ourselves: Every person who stands before us on the physical plane consists of physical body, etheric body, astral body, and Ego; and this Ego is such that it always works into the astral body up to the hour of death. The Christ-Jesus-Being, however, stands before us as One who had physical body, etheric body and astral body, but no human Ego, so that during the three years up to his death he was not subject to the influences that normally work upon human beings. The only influence came from the Christ-Being.
What it Means Today
For the priests of The Christian Community, founded with Steiner's help in 1922 under Friedrich Rittelmeyer, the Three Years are not a doctrine to debate but a reality enacted at the altar. The movement's central rite, the Act of Consecration of Man, traces the same descent Steiner outlined in the Karlsruhe lectures: a cosmic being entering earthly substance, bread and wine, body and blood. Where older theology argued over the two natures of Christ in fixed creedal formulas, Steiner placed the union in time. The Christ-impulse, in his reading, did not hover eternally above history; it lived through a specific human organism for thirty-six months, beginning at the Jordan and ending at Golgotha, and from that point worked into the whole of earthly evolution.
What a reader can do with this is read the Gospels differently. Steiner's distinctive claim, which would not appear in a generic survey of the life of Christ, is that the Baptism and the Resurrection bracket a single continuous act rather than two separate miracles. The Three Years become the hinge: every healing, every saying, every encounter falls inside the window when a being from the cosmos was learning to inhabit a body shaped on Old Saturn, Old Sun, and Old Moon. Anthroposophical study groups still take the four Gospels as four angles on this one stretch of time, reading Luke's Nathan Jesus and Matthew's Solomon Jesus as two preparations for the bodily nature the Christ would briefly wear.
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