It seems ,you do not believe in trinity.
If so , according to many christians you are not a christian.
Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils; Speaking lies in hypocrisy; having their conscience seared with a hot iron. Let no man deceive you by any means: for that day (the day of the Lord) shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition; Who opposeth and exalteth himself above all that is called God, or that is worshipped; so that he as God sitteth in the temple of God, shewing himself that he is God
Here is the issue doctrines of devils , the most important warning is against trinity . But trinity is not the only one , Original Sin and Atonement should be other injected doctrines .
Especially what Paul claims here is his own invention and against everything what Prophet Jesus pbuh has taught .
Philippians 2: 3-11
Do nothing from selfishness or conceit, but in humility count others better than yourselves. Let each of you look not only to his own interests, but also to the interests of others. Have this mind among yourselves, which is yours in Christ Jesus, who, though he was in the form of God, did not count equality with God a thing to be grasped, but emptied himself taking the form of a servant, being born in the likeness of men. And being found in human form he humbled himself and became obedient to death even death on a cross.