Sometimes, my doubt comes up. That's normal, I think. I believe that Jesus is God because of the evidence that I have available to me. If Jesus didn't raise from the dead, could someone have proof of that? Well, we have it written down that he did raise from the dead, so I would think that there could be a documentation saying that those early Christians were full of shit. So, I believe. And since Christ raised from the dead, it's up to my to try my hardest to understand the writings of Paul. I'm half way joking on this, but seriously. Paul's writings in the New Testament are tough!
When I have doubt, I put on a song that I love.