[Lukongsimi]

In the first one, we have to take it metaphorically. It cannot be literal "see" because then it would mean the Father also looks like a man. So when we take that "see" metaphorically, it can mean he is proof that God exists. 

As for the second one, we already discussed that "one". The disciples will also be in the same "one". Remember?

We are made in the image of God 
of course God look like man 
U think look like what? 
Jesus was born of the Holy Spirit not by man.
That is why Angel Gabriel went to inform Mary the virgin don’t be afraid 
Muh born time no angel informs  he was a man right ?