I developped one of my articles that was presented here:
http://www.jehovahs-witness.com/10/63589/1.ashx
To cut a long story short...
There is one verse that non-trinitarians like most, because it says about both Jesus and "The only God". Have a look at this:
1 Cor 8:5-6
for even if there are those called gods, whether in heaven, whether upon earth -- as there are gods many and lords many -- yet for us there is but one God, the Father, from whom all things came and for whom we live; and there is but one Lord, Jesus Christ, through whom all things came and through whom we live.
(NIV)
If they claim, that The Father is the only God and in this way Jesus isn't God, let them be consistent!!! If Jesus cannot be God then Father cannot be Lord, because Lord is only one, and Jesus is this Lord! (See also Jude 1,4)
But what to say about this:
Ps 8:1
1. O Jehovah our Lord, how majestic your name is in all the earth, You whose dignity is recounted above the heavens!
(NWT)
This fragment (1 Cor 8,6) that is considered by some non-trinitarians as the best evidence against trinity, in reality, is one of the best eveidence showing equality between the Father and the Son. The true significance of this verse is clear: Jesus is such Lord as His Father is God. Both of them are contrasted with gods and lords in relative meaning. Let's notice a very imprtant issue. For those people living in that time "Lord" in the absolute sense meant "JHVH"! And sucg Lord is called Jesus in this fragment. So, this verse poses a problem to non-trinitarians, not to trinitarians. They reject the conception of the trinity because its matematical notation contradicts common sense (1 God + 1 God + 1 God = 1 God), so let them explain such notation: (1 Lord + 1 Lord = 1 Lord), because Lord is only one (Ef 4,5 i 1 Kor 12,5), but Jesus is "one Lord" (1 Cor 8.6) and JHVH is Lord as well (Ps 8,1; Mk 12,29). Is JHVH our Lord in a relative meaning? If so, Jesus is His Lord (Rev 17,14; 19,16).
Regards
Greg Zebrowski (Poland)