From the beginning of the church until now, there has been a subtle influence on the interpretation of scripture. The Apostle Paul and John both vehemently defended the true gospel from those who would bring in damnable lies.
What many do not realize is that Gnosticism still permeates church doctrine today. Even those who call themselves "Bible Believing Churches" ironically have many "gnosticized doctrines".
In this video you will find something different than you usually see regarding "errors in the church'. I go back to the ancient early church fathers and show differences in basic doctrines from then till now.