If there is one God, as we believe, then that God is the same no matter whose book you read. It is not that God changes; human perception of God does. Luckily, we Christians don't have to depend on "visions," and "inner voices" and dreams and hallucinations. We have a set of books called the Gospels and they tell us an eyewitness account of our Lord and God as to what He said and did in Person. We take that God to be the true God who is merely prefigured in uncertain terms in the OT.
Weren't you the one who on this very thread chastised me by noting that the Gospels are NOT ALL in fact eyewitness accounts? I'm glad to see you've come around to seeing beyond the technicalities. :)
We take that God to be the true God who is merely prefigured in uncertain terms in the OT.
And we take the OT to be God's Holy and inspired word. We do not use words like "merely" to describe it.