The distinguishing sign:
Related Commentaries of John 8:28
John 8:28-30
28 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.
29 And he that sent me is with me: the Father hath not left me alone; for I do always those things that please him.
30 As he spake these words, many believed on him.