But why is it so certain that (a) there was no elect and (b) that the 'mystery' held openly among the initiated was somehow excluded from outsiders? Clearly we have evidence dating to the mid-second century that this was held to be true by even Catholics (Clement of Alexandria, Alexandrian tradition and others). Why do we disqualify the obvious answer (i.e. one which confirms the natural meaning of the term mystery) merely in order to appease evangelicals like TedM. The obvious answer is usually the right answer.Originally, the Greek word referred to a truth into which someone had been initiated. Indeed it came to be used of the secret teachings of the heathen mystery religions, teachings which were restricted to initiates. esoteric 'mysteries' reserved for a spiritual élite. On the contrary, the Christian 'mysteries' are truths which, although beyond human discovery, have been revealed by God and so now belong openly to the whole church. http://books.google.com/books?id=c8iuAw ... 22&f=false
Indeed even otherwise normative Christians (i.e. non-gnostics) like the Phrygian enthusiasts i.e. those who considered themselves 'Catholic' embraced the idea that Paul spoke of a 'spiritual elect.' The only way you completely demolish any trace of support for the ritual context for 'Christian mysteries' is to embrace an extreme minority position - i.e. that there were no 'elect' within the Church who could have been shaped by knowledge of the full mystery revealed by Christ to the apostles and Paul. I can't off hand think of a single early witness who denies that a 'mystery' was revealed by Jesus to an elite. The only difference between Irenaeus and the gnostics was likely who the 'elect' were defined as.
I think the difference between the Pauline Church and the rest of Christianity was that the former while acknowledging that Jesus revealed a 'mystery' to the apostles, they said that the mystery was only completely understood by Paul (or at least Jesus chose Paul the 'Paraclete' to reveal the mysteries again or in some other forum which the apostles could not understand). Those who held fast to the holiness of the apostles found this insulting. But I am not sure that any chasm exists between the mystery religion setting understood by let's say Justin and any of his gnostic contemporaries. Clearly all the building blocks for a mystery religion are there. I am not even sure that Irenaeus denies that Christianity was a mystery religion.
As I have said many times here TedM's understanding wasn't even established until Luther. The idea again was that Jesus came (a divine being). He announced a mystery that became the basis to the mystery religion that was the Church. For the Pauline Church Peter was chosen as head custodian of that mystery. For the Pauline Church it was Paul. In some form rather early in the Roman Church Peter and Paul sit next to one another as the twin thrones of the tradition. In due course Paul's authority disappeared in the Roman tradition and the see became exclusively identified as 'of Peter.' But the leadership of the Roman Church to this day is understood to have received the divine pronouncements of this 'god-man.' The mystery that is preserved by the Church necessarily sees that 'mystery' as going far beyond what TedM thinks it was and embraces Jesus establishing a new mode of worship and salvation = a mystery religion.