In The Likeness Of Sinful Flesh

And the Word became flesh, and dwelt among us, and we saw His glory, glory as of the only begotten from the Father, full of grace and truth. (John 1:14 NASB)

My God came in the flesh to save me, born of a virgin and without sin.

For what the Law could not do, weak as it was through the flesh, God did: sending His own Son in the likeness of sinful flesh and as an offering for sin, He condemned sin in the flesh, so that the requirement of the Law might be fulfilled in us, who do not walk according to the flesh but according to the Spirit. (Romans 8:3-4 NASB)

But the Bible tells me that He came in the likeness (ὁμοιώματι homoiōmati) of sinful flesh. That explains why He could become tired and needed rest. His flesh is not like that of Adam before the fall. Sinless, but in the likeness of sinful flesh.

By this you know the Spirit of God: every spirit that confesses that Jesus Christ has come in the flesh is from God; and every spirit that does not confess Jesus is not from God; this is the spirit of the antichrist, of which you have heard that it is coming, and now it is already in the world. (1 John 4:2-3 NASB)

And if any spirit were to appear to you in a vision, you will know if it is from God by asking it to confess that Christ came in the flesh. Every spirit that does not confess that Jesus came in the flesh is not from God.