Below is for our better understanding:
1. Beloved, trust not every idea or concept, but test the idea or concept whether they are of God: because many false ideas and concepts are gone out into the world.
2. Hereby we know the Spirit of God: Every idea or concept that acknowledges itself under all that Jesus Christ teaches and consists of is of God.
3. And every idea and concept that refuses to be under all that Jesus Christ teaches and consists of is not of God: and this is that idea and concept of against or other than Christ, whereof you have heard that such should come; and these ideas and concepts are even now already in the world.
"Idea or concept" comes from men. What I read, God does not accept what comes from MAN on matters pertaining to Him. Example:
God endows divine knowledge to "suckling or babes," therefore what "idea or concept" do these have in the eyes of God?
Isaiah 28:9 Whom shall he teach knowledge? and whom shall he make to understand doctrine? them that are weaned from the milk, and drawn from the breasts.
Luke 10:21 In that hour Jesus rejoiced in spirit, and said, I thank thee, O Father, Lord of heaven and earth, that thou hast hid these things from the wise and prudent, and hast revealed them unto babes: even so, Father; for so it seemed good in thy sight.
1 Corinthians 1:19 For it is written, I will destroy the wisdom of the wise, and will bring to nothing the understanding of the prudent.
1 Corinthians 1:20 Where is the wise? where is the scribe? where is the disputer of this world? hath not God made foolish the wisdom of this world?
1 Corinthians 1:21 For after that in the wisdom of God the world by wisdom knew not God, it pleased God by the foolishness of preaching to save them that believe.
Who was JESUS CHRIST before "coming in the flesh?"
This is GOD'S test to separate His "chosen few" from the "many called."