As I urged you when I was on my way to Macedonia, stay on where you are at Ephesus in order that you may warn and admonish and charge certain individuals not to teach any different doctrine, Nor to give importance to or occupy themselves with legends (fables, myths) and endless genealogies, which foster and promote useless speculations and questionings rather than acceptance in faith of God’s administration and the divine training that is in faith (in that leaning of the entire human personality on God in absolute trust and confidence)– 1 Timothy 1:3-4 (AMPC)
It is only the doctrine or teaching of Christ that gets us rooted, built up, and established. Colossians 2:6-7. The doctrine or teaching of Christ includes who He is, and what He has accomplished for us in His Life and Ministry on earth, Crucifixion, Death, Resurrection, Ascension, and Seating at the Father’s Right Hand in heaven.
It’s who Christ is and what He has accomplished for us in His Finished Work that saved us, made us right, accepted, and complete before God.
Any other doctrine or teaching that claims salvation, acceptance, rightness, and completeness outside of or in addition to Christ and His finished work is a false one.