I love the ‘problem’ presented by our Four Gospels. The problem of similarity and dissimilarity, so to speak. On one hand, we should explain why the Synoptics are so similar to each other, and, on the other hand, we should also explain why the Gospel of John is distinct with the Synoptics. There is a reason why the early church recognized the canonicity of all of them as opposed to only choose one of them or to harmonize them into one. They sticked to the three-and-one (pun intended).