Well, we don’t have to look too far. There’s compelling evidence that LDS Temple practices are remarkably similar to early Christian esoteric teachings that were given to the disciples privately and kept secret from the world.
Here are a few resources for your study.
*Restoring the Ancient Church * by Barry Roberts Bickmore
*The Eucharistic Words of Jesus * by Professor Joachim Jeremias
I’ve read the first book and it’s excellent. I’ve also read parts of the second and it’s also very good.
A few other interesting quotes I found here:
mormanity.blogspot.com/2005/01/mormon-temples-and-secrecy.html
In these circumstances, to speak of the Christian doctrine as a secret system, is altogether absurd.But that there should be certain doctrines, not made known to the multitude, which are (revealed) after the exoteric ones have been taught, is not a peculiarity of Christianity alone, but also of philosophic systems, in which certain truths are exoteric and others esoteric.
(Against Celsus, 1:7, in ANF 4:399, as cited by Bickmore, p. 296. )
Whoever is pure not only from all defilement, but from what are regarded as the less transgressions, let him be boldly initiated in the mysteries of Jesus, which properly are made known only to the holy and pure. The initiated of Celsus accordingly says, “Let him whose soul is conscious of no evil come.” But he who acts as initiator, according to the precepts of Jesus, will say to those who have been purified in heart, “He whose soul has, for a long time, been conscious of no evil, and especially since he yielded himself to the healing of the word, let such an one hear the doctrines which were spoken in private by Jesus to His genuine disciples.” Therefore in the comparison which he institutes between the procedure of the initiators into the Grecian mysteries, and the teachers of the doctrine of Jesus, he does not know the difference between inviting the wicked to be healed, and initiating those already purified into the sacred mysteries.
(Against Celsus, 3:60, in ANF 4:488, as cited by Bickmore, p. 296.)
A quote from the blog link above:
*There is much of value in the above quote from Origen. We learn that the Christians did have initiation ceremonies involving sacred mysteries taught privately by Christ to the disciples, and that those receiving these mysteries had to live high standards of personal worthiness and do so for a long time. This is remarkably similar to LDS practices. The temple is viewed as a sacred place with knowledge reserved for the pure. Temple recommends require interviews with two priesthood leaders, such as a bishop and a stake president, who determine if the candidate has been living high standards and keeping basic commandments of the Gospel. New converts must wait at least one year prior to being able to receive their Endowment in the temple, and extensive preparation is expected on the part of candidates.
Say, how do anti-Mormons explain the remarkable parallels between early Christian esoteric practices and the modern LDS approach? It’s a question worth asking.
By the way, some knowledge of these mysteries persisted into the third and fourth centuries. Even Athanasius spoke of the need to maintain a tradition of secrecy for some aspects of Christianity:
We ought not then to parade the holy mysteries before the uninitiated, lest the heathen in their ignorance deride them, and the Catechumens being over-curious be offended.
(Defense Against the Arians 1:11, in NPNF Series 2, 4:106, as cited by Bickmore, p. 300.)
This sounds like the LDS approach today as well.
The word “mysteries” in early Christian writings can refer to ordinances, not just teachings. As used in Greek, it normally referred to the practices of the Greek “mystery religions” that included ceremonies and teachings. As used it the New Testament, it can carry this nuance of rites as well as knowledge* (see G.G. Stroumsa, Hidden Wisdom: Esoteric Traditions and the Roots of Christian Mysticism, New York: E.J. Brill, 1996, p. 133, as cited by Bickmore, p. 300).