(Greek:
dokesis, semblance, appearance)
A group of heretics who date back to Apostolic times. Their teaching, that
Christ only "seemed" to be a man, to have been born, to have lived and
suffered, sought to destroy the meaning and purpose of the doctrine of the
Incarnation. Docetism, so far as is known, was always an accompaniment of
Gnosticism, and later of Manichaeism. Strictly, it is not a Christian heresy
at all, since it did not arise from a misconception of dogma by the faithful
but from the principle of antagonism between matter and spirit, which also
formed the basis for Gnosticism. Among its most famous opponents were Saint
Ignatius of Antioch, Saint Polycarp, Saint Hippolytus of Rome, and
Tertullian.
New Catholic Dictionary