FIrstly, I want to begin by saying the way you were treated by the Moravian Church is deplorable. You were excommunicated when according to ancient canon law clergy who engage in sodomy are to be deposed (and are also ineligible for ordination), and sodomy in general could be punished with penances of up to 30 years or until one was in extremis of penitential excommunication, wherein one was barred from receiving the sacrament but required to attend the church, standing with the penitents rather than the communicants. These canons have been relaxed according to the liturgical principle of oikonomia, as the canon law of the early church, which was intended to correct the immoral behavior that existed in the Roman Empire, was extremely severe, but bishops have always had the power to relax it according to the principle of oikonomia, that is, spiritual economy, to ensure the salvation of souls. The principle of
oikonomia is also why during the Arian schism in the fourth century, Arians converting to Nicene Christianity were not required to be baptized (particularly since in some cases, since Emperor Constantius illegally exiled Nicene bishops such as St. Athanasius the Patriarch of Alexandria and replaced them with Arians, followers of Arius who denied that Jesus Christ was of one essence with the father, God incarnate, but rather insisted that He was a created being. At present, contemporary Arians like J/Ws, and Unitarians, are normally received by baptism in most traditional churches.
Now, in answer to your question, in Luke 24 on two instances did our Lord show how all the writings of the Law and Prophets testified about Him:
25Then He said to them, “O foolish ones, and slow of heart to believe in all that the prophets have spoken!
26Ought not the Christ to have suffered these things and to enter into His glory?”
27And beginning at Moses and all the Prophets, He
[g]expounded to them in all the Scriptures the things concerning Himself.
44Then He said to them, “These
are the words which I spoke to you while I was still with you, that all things must be fulfilled which were written in the Law of Moses and
the Prophets and
thePsalms concerning Me.”
45And He opened their understanding, that they might comprehend the Scriptures.
It was in this manner that our Lord showed to the remaining disciples, who would form the core of the Apostles, joined by St. Matthias, St. Paul and the Seventy, how the Old Testament testified as to His death and resurrection.
The Alexandrian exegetical technique looks for typological prophecy in the Old Testament that pertains to Christ and to Christian soteriology. Thus, using the Alexandrian hermeneutic, Exodus is read as a spiritual journey from bondage to this world in Egypt through the deserts that are the trials of faith, to the Promised Land. Genesis 1 is read as a prophecy of how our Lord arrived in Jerusalem on the first day “Let there be light” would recreate humanity in His image on the sixth day, rest in the tomb on the seventh, and on the eighth day, the first of the next week, it is once again “let there be light” with His resurrection, and the eighth day is also interpreted as referring to the first day of the Age to Come, following the Last Judgement when the faithful will live with our Lord personally: this is called the mystical Eighth Day of Creation in Patristic sources.
This technique originated in the Catechtical School of Alexandria, which had a rivalry with the School of Antioch, which stressed a literal-historical method which is presently dominant in the Christian West. However, in the early church, the most important fathers used both approaches: St. John Chrysostom, St. Athanasius, St. Basil the Great, St. Gregory the Theologian and others regarded the Old Testament as both literally and historically accurate, while also containing the aforementioned typological prophecies.
Those who committed themselves too heavily to the Alexandrian method wound up with a metaphorical, allegorical approach which is unsatisfactory - the most extreme example of this can be seen in the text known as 1 Barnabas, which the early church considered including in the Bible, and some ancient manuscripts have it, but St. Athanasius in his 39th Paschal Encyclical, which was the first to provide the 27 book New Testament canon agreed upon by nearly all churches today, did not regard 1 Barnabas as either canonical, or even approve of its use for catechesis, and he was Patriarch of Alexandria, so if it had been authentic he would have approved it.
Likewise Origen is generally considered to have overused the Alexandrian method.
However, it was also possible to overuse the literal-historical method, and some scholars from Antioch, most notably Theodore of Mopsuestia, were regarded as having done that, but in recent years we see this approach taken to an extreme in some Western churches, where people exegete the New Testament using the Old, which is backwards.
The idea that the Old Testament should be interpreted according to the New is uncontroversial among traditional Christians, particularly liturgical Protestants such as Evangelical Catholic Lutherans such as my friends
@MarkRohfrietsch and
@ViaCrucis. But we also see it in the early church fathers and thus it is clear this was the method used by the Orthodox fathers.