mystagogus

Example:He was a tutor, guiding his student through the complexities of religious doctrine.

Definition:A person who teaches another, especially by private lessons; a teacher.

Example:The mystagogus served as an instructor in the mysteries of the faith.

Definition:A person who teaches in schools, colleges, or other institutions of learning; a teacher.

Example:The priest was a catechist, teaching the neophytes the basics during their mystical journey.

Definition:A person who instructs pupils in the rudiments of religion, especially in the Christian religion, through a series of lessons or questions and answers known as catechism.