In general Protestantism holds to the doctrine of sola scriptura (Scripture alone). The problem with this is, and the question always has to be asked, “The Bible according to whom?” All 38,000+ Protestant denominations claim Christ and the Bible to be correct – even in the face of clear contradictions with others who claim to be of the same denomination. How is the unity that Jesus prayed for in John 17 achieved by this?
The Scriptures themselves contradict the Doctrine of sola scriptura.
2 Thessalonians 2:15 – “Therefore, brethren, stand fast, and hold the traditions which you have been taught whether by word, or our epistle.”
2 Thessalonians 3:6 – “Now we command you, brethren, in the name of our Lord Jesus Christ, that you withdraw yourselves from every brother that walks disorderly, and not after the tradition which he received of us.”
It is interesting that in certain versions of the Bible like the NIV, Protestants have changed the actual meaning of the word from “tradition” to “teachings” in the above passages.
The question then arises, what traditions are we to hold too? The answer has always been: Apostolic Tradition… which Orthodoxy has clung too for 2000+ years.