Q-How did we get the Bible?
A-The Only Authority for the Bible is the Catholic Church
If we want to use scripture to prove anything..
we must first be assured it is scripture!..
..and if you say Bible Alone;
you've got a bigger problem..
because the bible doesn't tell us what books make up the bible.. Who could?
The Bible was determined (in A.D.382) by bishops of the Catholic Church consisting of 27 New Testament and 46 Old Testament books (73 total)
These scriptures were primarily established to be the only liturgical readings, read at Mass.
The Bible is the Word of God; but not the only Word from God...
God would not allow almost 400 years of time to pass without any direction for Christians.. (over 12 generations after Christ walked our earth)
He promised us the Church with tradition and authority guided by The Holy Spirit. Jesus never commanded the apostles to write; but He did tell them “To Go into all the world and preach the Gospel” (Mark 16). He also said.. “He who hears you, hears me; he who rejects you, rejects me” (Luke 10:16). Saint Paul gave instructions;"Stand Firm and hold to the traditions which you were taught by us, either by word of mouth or by letter"(2 Thess.2:15). If not for the Teaching Magisterium of the Church; the scriptures would be words without authority!
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Saint Athanasius (Church Father in A.D.367) witnessed to the contents of the New Testament, exactly as we have them today.
(listing same books of NT.. however some variances of OT).....