Mystagogue

There is an overruling destiny above us, though not in the sense in which it was viewed by that wretched man, who, beguiled by some foreign mystagogue, used the awful word as the ready apology for whatever he chose to do—we must examine the packet.

Source: wiktionary

Philosophers themselves, the mystagogues in the temple of decorum, must approach it with reverence, and after all are allowed only to turn it aside a very little.

Source: wiktionary

It is simply common sense, combined with uncommon courage, which includes uncommon honesty and uncommon patience; and if you will be brave, honest, patient, and rational, you will need no mystagogues to tell you what in science to believe and what not to believe; for you will be just as good judges of scientific facts and theories as those who assume the right of guiding your convictions.

Source: wiktionary

Yet again the thought of Death as the deliverer, the revealer, and the mystagogue, through whom the soul of man is reunited to the spirit of the universe, returns; and on this solemn note the poem closes.

Source: wiktionary