Matthew 15:8-9 8
"‘THIS PEOPLE HONORS ME WITH THEIR LIPS,
BUT THEIR HEART IS FAR AWAY FROM ME.
9‘BUT IN VAIN DO THEY WORSHIP ME,
TEACHING AS DOCTRINES THE PRECEPTS OF MEN.’”
What is man-made doctrine? There is no text-book definition but if I were to offer one it would be from a former professor of mine who said, "[Man-made doctrine] is any teaching or theological model that cannot be firmly anchored to scripture and is outside of orthodox Christianity." I think this a good definition because it recognizes that not every teaching has an explicit verse that clearly states the teaching. The definition also recognizes that even though a specific teaching may not be without its critics, it remains within orthodox Christianity. For example, one Christian is pre-millennial while another is amillennial. Obviously, one view is incorrect, although both views are accepted within orthodoxy.
So, how can we distinguish between orthodox Christian teaching and man-made teachings? First, I am not necessarily referring to obvious non-Christian teachings from groups like the Jehovah's Witnesses and the Mormons, although they certainly promote man-made teachings. Within orthodox Christianity, man-made doctrines are often found. Some of these teachings appeal to scripture but draw their conclusions from human reasoning apart from scripture. We see examples of this in the prosperity gospel and certain aspects of the Pentecostal/Charismatic movements. Dr. Norman Vincent Peale's power of positive thinking mantra has grown up into the self-affirmation teachings of Joel Osteen. These are just examples of man-made teachings that have infiltrated our churches to greater or lesser degrees.
It is important to point out that not everything we disagree with is a man-made doctrine. However, when you hear things like, "This is how I feel..." or "I cannot find it in the Bible but...", caution flags should go up. Truth is not dependent on how we feel and truth must be grounded in scripture. It should also be within the realm of orthodox Christianity. The Apostle John tells us in 1 John 4:1, "Beloved, do not believe every spirit, but test the spirits to see whether they are from God, because many false prophets have gone out into the world." God has given us His word in order to do exactly that.
Acts 17:10-11
The brethren immediately sent Paul and Silas away by night to Berea, and when they arrived, they went into the synagogue of the Jews. Now these were more noble-minded than those in Thessalonica, for they received the word with great eagerness, examining the Scriptures daily to see whether these things were so.