Doubts can produce positive side-effects - if you work toward resolving them.
Christians can have doubts and they can have questions and the unhealthy way to deal with that is to keep them inside where they fester and grow and can undermine our faith. The healthy way to deal with it is to talk about it and be honest about it.
Learning about the intellectual basis for Christianity bolsters the faith of Christians-espe cially those who may be experiencing doubts-and prepares them to share Christ with others.
To be honest, I didn't want to believe that Christianity could radically transform someone's character and values. It was much easier to raise doubts and manufacture outrageous objections that to consider the possibility that God actually could trigger a revolutionary turn-around in such a depraved and degenerate life.
I don't feel like I was argued into the faith, but I feel like the evidence knocked down a succession of objections and issues and questions and doubts that I had, that sort of cleared the pathway for me to come to the faith.
Of course, there are always going to be some unsettled areas, but for me the overall evidence for Christianity chases away any real doubt that it's true.
