A: IF G-d is indefinable, how can we define him as exclusively spiritual? Does he not have the power and the authority to enter the Human Race if it suits him to do so? Humanity only limits G-d if the human form is all that he has. The Christian concept of Trinity avoids this limitation by viewing G-d as existing both as the omnipresent spiritual Father and the Son of G-d who was born into the human race at the appointed time. Indeed, G-d has said in the Torah "There shall no man see me and live," yet repeatedly in the Hebrew Bible, people do see G-d and live. This makes sense if G-d exists in separate persons as an invisible Father and a visible Son.

It is true that the word "Trinity" does not occur in the New Testament, but the concept is implied. See the Trinity article at http://www.amfi.org/trinity.htm for more.