Check if doctrine of your Church is same as the doctrine of Christ?
Jesus said: My sheep hear my voice, and I know them, and they follow me.
Sheep is very familiar to masters voice.
In Old Testament Israel heard the voice of Jehovah at mount sinai. Law has the form of knowledge and of the truth (Romans 2:19)
As the form, knowledge and voice is already available, disciples identified Jesus.
But the enemy try to distort by bringing about different doctrines, which distorts the truth and knowledge.
Romans 6:17 says “obeyed from the heart that form of doctrine which was delivered you”
So doctrine is only one and it is so important that, this doctrine only delivers from Sin and it should be heartily obeyed.