John 8:14-18
New International Version (NIV)
14 Jesus answered, “Even if I testify on my own behalf, my testimony is valid, for I know where I came from and where I am going. But you have no idea where I come from or where I am going. 15 You judge by human standards; I pass judgment on no one. 16 But if I do judge, my decisions are true, because I am not alone. I stand with the Father, who sent me. 17 In your own Law it is written that the testimony of two witnesses is true. 18 I am one who testifies for myself; my other witness is the Father, who sent me.”
Huh. So maybe that answers the question. Jesus was bearing witness to himself, and his Father was bearing witness to him.
John 18:37
New International Version (NIV)
37 “You are a king, then!” said Pilate.
Jesus answered, “You say that I am a king. In fact, the reason I was born and came into the world is to testify to the truth. Everyone on the side of truth listens to me.”
John 14:6
New International Version (NIV)
6 Jesus answered, “I am the way and the truth and the life. No one comes to the Father except through me.
If you put all that together, it kinda sounds like Jesus was bearing witness to himself, as the means of approaching the Father. Whereas JWs seem to focus on the Father's name/qualities as the means to understanding Jesus or some such thing, like you can only understand Jesus by knowing Jehovah (and "his organization", of course) first.
I may be wrong here.
--sd-7