I have often been irritated with the way many evangelicals insist on preaching from a self-written, uninspired, 5th gospel, which they call A Harmony of the Gospels. They fit together the four different accounts of the life of Christ, attempting to reconstruct history. After their history is “neatly” constructed they exegete and preach their account instead of inspired Word of God, the Bible.
Let me assure you, I have a strong confidence in the historical accuracy of the Scriptures. Yet, we should not treat the gospels as mere tools to aid us in our reconstruction of historical events which are then exegeted and expounded upon in the pulpit. Rather, we are to preach the Word of God as expressed in the inspired writings of Matthew, Mark, Luke and John, and not our feeble harmonies and reconstructions. Craig Blomberg shares these sentiments in Jesus and the Gospel: An Introduction and Survey, page 106:
Readers of the Gospels from the beginning of church history have recognized that the different writers had different theological emphases. The church’s preoccupation with constructing harmonies of the life of Christ generally blurred these distinctions. Ironically, it is often those more conservative Christians, who insist most strongly on the inspiration and inerrancy of the very texts the evangelists penned, who pay least attention to the form in which those texts were inspired, opting instead to study an artificial man-made synthesis of the four.