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The Old Testament was complete in writing around the second century before Christ, in the days of the Maccabean kings, although the last book of the Old Testament is prior to the Maccabean kings, and prophesies the coming of the second Elijah, who is the Prophet John the Baptist, who witnessed the Spirit in the form of a Dove descending on Jesus.
The books of the New Testament all date to the first century after Christ, written by people who knew Jesus or his immediate disciples. They are prior to whatever Church conclave sat and discussed them. Jesus peformed miracles and resurrected from the dead on the third day, which is Easter.
The Orthodox Church never used biblical scripts for other ends, where-as the popes thrived on all sorts of trinkery. The most notable probably the Constitutium Constantini, a myth of all times!
However, a biblical script dating to the first century cannot be held responsible for what others did centuries later, and what we read in the Bible is original Script.
Personally I have the New Testament in original ancient Greek, and often consult it to check the translation of words in the modern English translations. To know how to read the Greek alphabet is important in Bible studies, because even if there is word in ancient Greek one can't understand, one can translate its meaning. But one picks up the general meaning with experience.
I also know how to read the Old Testament in original Hebrew script. Again, a dictionary helps, but I know many Hebrew words too. It helps out tremendouly in sorting out why rabbis interpret some Old Testament scripts in one way, and the Christians in an other.