WOW, that sure does make things complicated
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It’s simple to believe in our Lord, God and Savior Jesus Christ, but that doesn’t mean understanding the nuances of dogmatic theology or ecclesiastical history or pastoral care or the many other subjects studied by clergy are simple. There is a reason why so many important theologians such as Martin Luther have obtained doctorates or had equivalent education, going back to the early church where St. Irenaeus, Origen, St. Athanasius, the Cappadocians, Eusebius of Caesarea and St. John of Damascus, among others, were the most brilliant and educated minds of their era. Indeed if we go back to the New Testament itself, I am aware of no academic of the first century whose intellectual ability approached that of St. Matthew, St. Paul, St. Luke, St. Mark, St. John, St. Peter, St. James or St. Jude. Not all of the apostles were intellectuals, but the ones who required advanced intellectual abilities were granted it after the fashion of St. Solomon the King and Prophet. Indeed we see this in how those Apostles who wrote books of the Bible had originated, except for St. Matthew, St. Levi and Judas the traitor, as a group of fishermen, some of them being young; teenagers probably in several cases.
As an aside, I myself believe St. John the Beloved Disciple was probably 13 when he and his elder brother St. James the Great became disciples of our Lord were recruited - this makes his adoption by the Theotokos of mutual benefit and also explains how he managed to live into the ninth decade and survive his exile on Patmos in the years prior, which was a harsh wilderness; it helped that he was not martyred, but that he was younger than the others makes a great deal of sense. This is an example of what we call a theologuomemnon: a theological opinion which does not contradict Orthodox, Patristic doctrine but which is also not officially doctrinal; in the Orthodox church one has the freedom to embrace theologoumemna as long as one remains within the pale of Orthodoxy as established by the ecumenical councils, which gives us quite a lot more freedom than many, perhaps most denominations, while still ensuring we agree on that which is important. The other thing is that we don’t try to elevate theologoumemna to the level of doctrine or conflate them with doctrine, since this could lead to error, but rather differentiate between the two, and we do not believe in doctrinal development.