What do you think of "Heresy"? The word doesn't sound good, right? Some people think it is the heresy that a new denomination is made except the existing denominations. Other people think the denominations which don't believe in Jesus or heaven and hell are kinds of heresy. We have to know the meaning clearly. The wrong definition can make victims of witch hunts or stir up the popular passion.
Relative Heresy" and "Absolute Heresy". Let's distinguish them well.
Relative Heresy: A heresy judged by the dogma of a denomination. Sometimes, the True Church is branded as heretical by the relative standards of men, not by the absolute standard of the Bible.
The representative example is the belief of the Early Church, which was branded as heresy.
" We have found this man to be a troublemaker, stirring up riots among the Jews all over the world, He is a ringleader of the Nazarene sect." (Acts 24:5)
Judaists didn't believe in Christ who came in the flesh, and stuck to the old covenant.
Moreover, they denounced the belief of the Early Church that kept the new covenant, as heresy.
However, the Early Church absolutely believed the promise that God would come in the flesh (Isaiah 9:6) and establish the new covenant (Jeremiah 31:31).
The Early Church absolutely believed that Jesus is God in the flesh, and spread the new covenant that Jesus established.
The Early Church looked heretical in the eyes of the Jewish leaders, but was the True church in God's point of view.