I was going to wisecrack about the heresies, but seriously, I think we can label ourselves Christian, but that’s like our flattering ourselves.
Who loves so much and is so humble that he does not speak out, instead just loves his neighbor in person and his Lord and wishes only to love with more of himself, not to define himself to others.
Theological points are of true value, but to the Joe Christian that God calls us to be first, true love of neighbor, humble, personable love, is the outside sign...
“is so humble that he does not speak out”
Acts 18:26 He(Apollos preaching the incomplete “Word”) began to speak boldly in the synagogue. When Priscilla and Aquila heard him, they invited him to their home and explained to him the way of God more adequately.
...they... man & wife took Apollos aside...privately...
BUT They Did Speak Out...to correct an incomplete knowledge of The Gospel...The Good News
https://www.biblegateway.com/quicksearch/?quicksearch=Aquila&qs_version=NIV
See also the full chapter:
https://www.biblegateway.com/passage/?search=Acts%2018&version=NIV
I do agree with you that we should teach the Gospel...
use the Bible if you have to.( ; )