During earth life the power of Ahriman leads to the consideration of physical-sensory existence as the only one, thus barring all outlook into the spiritual world. In the spiritual world this power leads the human being to complete isolation, to concentration of all interests only upon himself. Human beings who at death are in the power of Ahriman are reborn as egotists.
Source: Rudolf Steiner – GA 13 – An Outline of Occult Science: IV: The Evolution of the Cosmos and Man: Part 7
Translated by Maud and Henry B. Monges and revised for this edition by Lisa D. Monges.
Rudolf Steiner, who founded the esoteric spiritual movement anthroposophy, used the concept of Ahriman to name one of two extreme forces which pull humanity away from the centering influence of Christ. Steiner associated Ahriman, the lower spirit, with materialism, science, hereditary, objectivity and soul-hardening. He thought that contemporary Christianity was subject to Ahrimanic influence, since it tended towards materialistic interpretations. Steiner predicted that Ahriman, as a supersensible Being, would incarnate into a human form, ‘some little time after our present earthly existence, in fact in the third post-Christian millennium’.