8. A Mediator must be separate from both parties.
1 Timothy 2:5
For there is one God, and one mediator between God and men, the man Christ Jesus.
This objection is taken from our human experience; we want a mediator that is impartial, one that is not going to choose sides. If a mediator is part of the parties involved there is too much room for dishonesty and corruption. But this wouldn't be the case with Jesus, how would he be impartial or dishonest.
But Jesus is God, and as a mediator he has partiality to both sides. He is also perfectly righteous, just and trustworthy. Why wouldn't the perfect mediator be one that understood both sides perfectly, who's interests are for the benefit and welfare of all involved, and one who also had the solution? Only Jesus knows what it is to be a man, and also knows perfectly God the Father. This would rather make him the perfect mediator, rather than disqualify him. The idea that a mediator has to be a separate being is mistaken.
9. Has anyone seen God?
John 1:18
No man hath seen God at any time; the only begotten Son, which is in the bosom of the Father, he hath declared him.
1 John 4:12
No man hath seen God at any time. If we love one another, God dwelleth in us, and his love is perfected in us.
These seem to indicate that the Son is not God, and they would seem to be false if Jesus was God. This creates a problem because many places in the Bible we find Jesus and God and the Holy Spirit are the same person.
John 14:9
Jesus saith unto him, Have I been so long time with you, and yet hast thou not known me, Philip? he that hath seen me hath seen the Father; and how sayest thou then, Shew us the Father?
Then if by this statement Jesus is not saying that he is God, or even indicating it, but only declaring that he is showing them the actions and heart of the Father, who cannot be seen. Why didn't Jesus just say, read the scriptures? Were they not written to show us who God is?
John 5:39
Search the scriptures; for in them ye think ye have eternal life: and they are they which testify of me.
So the Old Testament seems to be written of Jesus, and also of God. But the real problem with all this is that the Bible declares that men have seen God.
Who was it that John saw here?
In Revelation 4:1-8 John describes heaven and the one who sits on the throne finishing with this:
And the four beasts had each of them six wings about him; and they were full of eyes within: and they rest not day and night, saying, Holy, holy, holy, Lord God Almighty, which was, and is, and is to come.
Now one might say that this was a vision, or he was in the spirit, and that it was not real, but there is no such stipulation in the verse "no man hath seen God at any time." The Greek word for "seen" means either to see with the eyes, or perceive with the mind.
Another objection might be that John wrote this after he said that no man had seen God, so until then those statements were correct. The problem with this is that Isaiah and Ezekiel saw the same thing hundreds of years before John was even born.
Isaiah 6:1-4
In the year that king Uzziah died I saw also the Lord sitting upon a throne, high and lifted up, and his train filled the temple. Above it stood the seraphims: each one had six wings; with twain he covered his face, and with twain he covered his feet, and with twain he did fly. And one cried unto another, and said, Holy, holy, holy, is the LORD (Jehovah) of hosts: the whole earth is full of his glory. And the posts of the door moved at the voice of him that cried, and the house was filled with smoke.
Ezekiel 1:26-28
And above the firmament that was over their heads was the likeness of a throne, as the appearance of a sapphire stone: and upon the likeness of the throne was the likeness as the appearance of a man above upon it. And I saw as the colour of amber, as the appearance of fire round about within it, from the appearance of his loins even upward, and from the appearance of his loins even downward, I saw as it were the appearance of fire, and it had brightness round about. As the appearance of the bow that is in the cloud in the day of rain, so was the appearance of the brightness round about. This was the appearance of the likeness of the glory of the LORD. And when I saw it, I fell upon my face, and I heard a voice of one that spake.
Exodus 33:17-23 Moses also saw God
And the LORD said unto Moses, I will do this thing also that thou hast spoken: for thou hast found grace in my sight, and I know thee by name. And he said, I beseech thee, shew me thy glory. And he said, I will make all my goodness pass before thee, and I will proclaim the name of the LORD before thee; and will be gracious to whom I will be gracious, and will shew mercy on whom I will shew mercy. And he said, Thou canst not see my face: for there shall no man see me, and live. And the LORD said, Behold, there is a place by me, and thou shalt stand upon a rock: And it shall come to pass, while my glory passeth by, that I will put thee in a clift of the rock, and will cover thee with my hand while I pass by: And I will take away mine hand, and thou shalt see my back parts: but my face shall not be seen.
These four instances show that God has indeed been seen. So the problem is that the Bible declares that no man has seen God and we find four instances (and there are more) where men have seen God. It is a contradiction unless there is more than one person that is God. Then all three would have to be seen in order to that statement to be false. Believing that God is not a trinity makes the two statements made by John irreconcilable. If no one has seen God, yet the Bible declares men have seen God, then the Bible is false. The Bible is not false, and God is three persons, so it is perfectly possible for men to have seen "The Son" who is God, and not "The Father" who is God, or the "Spirit" who is God. Making John's statements correct, because the invisible God no one has seen, but Jesus, God the Son we have seen. Without the trinity, the contradiction of who has seen God becomes unsolvable.