but my point has always been this undermines your whole unanimous consensus
Unanimous consent of the Fathers only relates to 1)
Complex Scriptural passages which cannot be read literally, and which unanimous agreement proves that the Apostles taught the Church Fathers all the same thing, which proves that this teaching came from Christ.
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2) Tradition - that is,
non-scriptural teachings are proven to be from the Apostles, from Christ.
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St Justin Martyr's musings on how salvation worked in the Old Law does not prove BOD. The unanimous consensus against BOD is a separate issue because, again, the Old Law was different than the New.
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Based on your earlier complaint that God is unfair for the Old Law being different than the New, I would argue that the Old Law is more lenient, more open and more merciful than the New (from a human perspective). In reality, both Old and New are the same merciful rules, because God is all-mercy and unchanging.
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The old law is different because Israel's purpose was not to spread out and preach to all nations (as is the Church's purpose). Israel's purpose was to be a "candle in the darkness" in the midst of a pagan world. Her message was to spread the coming Redeemer/messiah and for people to convert to the natural law and belief in Christ. Thus, it's possible that Socrates could be saved if he believed in the Messiah (I'll grant this for argument's sake).
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But...when the Church came through Christ, which was a fulfillment and perfection of the Old Law, thus the New Law was perfect and the requirements for salvation were more strict. With the culmination/maturation of the Roman Govt, God made sure that (humanly speaking) the Church/Apostles could spread the Church fairly and practically, even though God also worked multiple, quadrillion upon quadrillion of miracles in the first 5 centuries so that people would know that the Church as true.
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The Old Law spread by word-of-mouth, but could be fulfilled by the 10 commandments and faith. It was easy to hear the truth and easy to keep it. The Old Law's salvation rules were based on belief because that is how God revealed Himself to people of the time.
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The New Law spread by word-of-mouth but in addition to the 10 commandments and faith, the additional requirement was VISIBLE acceptance and VISIBLE membership in a VISIBLE church, because God was no longer loved by faith alone, for He had come to earth VISIBLY, and thus, to love Him required VISIBLE union with His Church (i.e. baptism) and VISIBLE union with Him (i.e. Holy Communion). So Christ sent out VISIBLE Apostles to spread the Faith, who worked VISIBLE miracles and used VISIBLE sacraments.
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The Old Law requirements for salvation were less stringent because knowledge of God was less. The New Law is a perfect union of God with man, so more is required for us to be united to His Church. There is no contradiction here. God deals with all men equitably, based on the requirements He lays down. He is an all-loving King; He is the most wise ruler, He is an all-just Judge.