Does “Doctrine OF Christ” in II John 9 Mean Doctrine “From Christ” Or “About Christ”?

When II John 9 says “Whosoever transgresseth, and abideth not in the doctrine of Christ, hath not God,” does “doctrine of Christ” mean the “doctrine from Christ” or the “doctrine about Christ”? If it means “doctrine from Christ,” that would show any violation of God’s word causes us to be lost, right? Not so if it is just limited to those “who confess not that Jesus Christ is come in the flesh” (7), a “doctrine about Christ.” For the answer to this extremely important question, consider what that same sentence form means in the below texts: does “of” mean “from” or “about” in the following?

Matt 16:12 Then understood they how that he bade them not beware of the leaven of bread, but of the doctrine of the Pharisees and of the Sadducees.

Acts 13:12 Then the deputy, when he saw what was done, believed, being astonished at the doctrine of the Lord.

Matt 15:9 But in vain they do worship me, teaching for doctrines the commandments of men.

Mark 7:7 Howbeit in vain do they worship me, teaching for doctrines the commandments of men.

I Tim 4:1 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;

Tit 2:10 Not purloining, but shewing all good fidelity; that they may adorn the doctrine of God our Saviour in all things.

John 18:32 That the saying of Jesus might be fulfilled, which he spake, signifying what death he should die.

John 4:39 And many of the Samaritans of that city believed on him for the saying of the woman, which testified, He told me all that ever I did.

I John 2:14 I have written unto you, fathers, because ye have known him that is from the beginning. I have written unto you, young men, because ye are strong, and the word of God abideth in you, and ye have overcome the wicked one.

I John 2:17 And the world passeth away, and the lust thereof: but he that doeth the will of God abideth for ever.

I John 5:9 If we receive the witness of men, the witness of God is greater: for this is the witness of God which he hath testified of his Son.

III John 12 Demetrius hath good report of all men, and of the truth itself: yea, and we also bear record; and ye know that our record is true.

Rev 2:14 But I have a few things against thee, because thou hast there them that hold the doctrine of Balaam, who taught Balac to cast a stumblingblock before the children of Israel, to eat things sacrificed unto idols, and to commit fornication.

Rev 2:15 So hast thou also them that hold the doctrine of the Nicolaitanes, which thing I hate.

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