Read John 8:28 Using Other Translations
Then said Jesus unto them,When ye have lifted up the Son of man, then shall ye know that I am he, and that I do nothing of myself; but as my Father hath taught me, I speak these things.
So Jesus said to them, "When you have lifted up the Son of Man, then you will know that I am he, and that I do nothing on my own authority, but speak just as the Father taught me.
So Jesus said, “When you have lifted up the Son of Man on the cross, then you will understand that I AM he. I do nothing on my own but say only what the Father taught me.