Ok, I posted this on another thread, but it might be more appropriate here. If you accept the Trinity theory, then a whole bunch of logical impossibilities can occur.
1) you have to accept that jesus was both 100% man and 100% God. As anyone who has taking grade school math can attest, this is not possible.
2) When Jesus went off by himself to pray, who was he praying to? Was he praying to himself? Makes no sense.
3) When Jesus went off into the desert and was tempted by the devil. If Jesus is God, then who cares? How do you tempt God into sinning. Can't be done.
4) It is said that Jesus led the perfect life and therefore his death was the perfect sacrifice. Once again, if Jesus is God, then who cares? How hard is it for God to lead the perfect life? I would say it would be pretty easy. But if Jesus were a man.....
5) When Jesus was on the cross, he cried out " Eloi, Eloi, Lema Sabachthane?" He was clearly suffering here and was crying out to God. If he were God, why is he crying out to himself.
6) Jesus died on the Cross. How can you kill God? Impossible.
7) The salvation story. If Jesus is God, then the Salvation story boils down to "God sacrificied himself to appease himself". Makes NO sense.
I have to admit, Jesus as Man makes the story fit alot better.