When I read church history and read the biographies of great Christians I see how common it is for godly men to disagree on issues even as fundamental as predestination and free will. Having a perspective on these issues that is two thousand years wide is much more valuable than having a perspective that spans only a few years or a handful of books. Even when dealing with difficult issues, it is important that we display the kind of humility that Wesley forsook. We need to understand that greater Christians than ourselves wrestled with these issues and often came to differing conclusions, whether the topic is the doctrines of grace, the end times, the meaning and mode of baptism, and so on. We are so blinded by our sin and our corrupted powers of reasoning that we will never know the truth exhaustively. Studying the history of the church helps keep us grounded, showing that there is bound to be disagreement and hopefully showing how we can work together for the sake of Christ and his gospel despite such disagreement.
This is most of the concluding paragraph in a posting you should read entirely.