Is the 'tradition' or 'mysteries' that Christians have been told that the church follows from another origin. If these 'tradtions' or 'mysteries' are not a Christian belief, where does it come from, well lets focus on the origin of these 'Mysteries'. It seems that many corruptions from Greek mythology and Hellenistic philosophy and other non Christian sources such as Gnosticism came into the early church and this included the ancient 'Mysteries'. So lets see what these were..
...The cults of the mystery religions were influenced uniformly by the ideas of the Greek philosophers. A few of them existed before the turn of the Era, but several more appeared at about the turn of the Era. They reached their height of popularity during the times of early Christianity. Christianity was born during a period of proliferation. Christianity itself in the beginning consisted of many cults that existed independently and had very diverse doctrines. Because of such diversity, it is debatable whether Gnosticism was just another cult of Christianity or whether it was a separate religion.
The following features were common to all mystery religions. Admission to the community was by a rite of initiation, a solemn consecration. The initiation was held in secret, which explains why they were called "mysteries."...
Esoteric Christianity: The Greek Mystery Religions and Their Impact on Christianity
Now the problem was that many Christians leaders were influenced or had picked up the pagan 'Mysteries' and mixed it with Christianity. Clement of Alexandria stated that 'what was taught in the Mysteries concerned the universe, and was the completion and perfection of all instruction; wherein things were seen as they were, and nature and her works were made known.'
Clement of Alexandria writings show that he was completely immersed in the pagan 'Myesteries' and are full of terminology taken directly from the language of the Pagan Mysteries. He writes of the Christian revelation as 'the holy Mysteries.' the ';divine secrets',... Clement further states 'I am become holy while I am being initiated.' Clement tells us that in early Christianity there were likewise Lesser Mysteries for beginners on the spiritual path and Greater Mysteries which were a secret higher knowledge, which led to full 'initiation.' The 'secret traditions of true Gnosis,' he explains, had been transmitted 'to a small number, by a succession of masters, and not in writing.'
So then we find the following connection...
"Alexandria was, in addition, one of the chief seats of that peculiar mixed pagan and Christian speculation known as Gnosticism. Basilides and Valentinus taught there. It is no matter of surprise, therefore, to find some of the Christians affected in turn by the scientific spirit. At an uncertain date, in the latter half of the second century, "a school of oral instruction" was founded. "
clement of alexandria
Note, it mixed pagan and Christian speculation, so a combining of paganism into Christianity
...The cults of the mystery religions were influenced uniformly by the ideas of the Greek philosophers. A few of them existed before the turn of the Era, but several more appeared at about the turn of the Era. They reached their height of popularity during the times of early Christianity. Christianity was born during a period of proliferation. Christianity itself in the beginning consisted of many cults that existed independently and had very diverse doctrines. Because of such diversity, it is debatable whether Gnosticism was just another cult of Christianity or whether it was a separate religion.
The following features were common to all mystery religions. Admission to the community was by a rite of initiation, a solemn consecration. The initiation was held in secret, which explains why they were called "mysteries."...
Esoteric Christianity: The Greek Mystery Religions and Their Impact on Christianity
Now the problem was that many Christians leaders were influenced or had picked up the pagan 'Mysteries' and mixed it with Christianity. Clement of Alexandria stated that 'what was taught in the Mysteries concerned the universe, and was the completion and perfection of all instruction; wherein things were seen as they were, and nature and her works were made known.'
Clement of Alexandria writings show that he was completely immersed in the pagan 'Myesteries' and are full of terminology taken directly from the language of the Pagan Mysteries. He writes of the Christian revelation as 'the holy Mysteries.' the ';divine secrets',... Clement further states 'I am become holy while I am being initiated.' Clement tells us that in early Christianity there were likewise Lesser Mysteries for beginners on the spiritual path and Greater Mysteries which were a secret higher knowledge, which led to full 'initiation.' The 'secret traditions of true Gnosis,' he explains, had been transmitted 'to a small number, by a succession of masters, and not in writing.'
So then we find the following connection...
"Alexandria was, in addition, one of the chief seats of that peculiar mixed pagan and Christian speculation known as Gnosticism. Basilides and Valentinus taught there. It is no matter of surprise, therefore, to find some of the Christians affected in turn by the scientific spirit. At an uncertain date, in the latter half of the second century, "a school of oral instruction" was founded. "
clement of alexandria
Note, it mixed pagan and Christian speculation, so a combining of paganism into Christianity