I don't know if this goes here, but I'm pretty sure it's a theological question: what prevents the PCA and OPC from merging and forming one unified church? I've attended a PCA and an OPC and it seems to me that the OPC is slightly more conservative theologically than the PCA. Maybe it's just my limited viewpoint, but it seems to me that the difference is so minor that it shouldn't really be a problem. I would really appreciate some help with this.

In the midst of your sadness and woe, when you are tormented and afflicted, have comfort! God's will is done.