Monarchianism
A Christian heresy which taught that God is a single entity and that Jesus was a pure man, born of a virgin, who was adopted by God.
Monotheism
The worship of one God in whom the fullness of all things dwell. Nag Hammadi: A location in Egypt in which Gnostic writings were discovered, including the Gospel of Thomas.
Mystery religion
This term is most often used to refer to a group of religions in ancient Greece and Rome which existed in competition with the official state religions. Some consider the primitive Christian movement to have been a mystery religion.
Mysticism
The belief and practice of a third form of knowledge — one which is beyond sense knowledge and knowledge by inference.
Myth
A story that is not literally true, which portrays fundamental spiritual and religious truths. They do not represent reality, but contain much wisdom.