Gospel And Sound Doctrine: Once Upon A Time

Fred Sanders in Introduction to Christology: Chalcedonian Categories for the Gospel Narrative wrote:

Once upon a time, the people most committed to the gospel were the people most inclined to serious theological thought. The deepest doctrines of Christianity, the ones that are not on the surface of the Scriptures but lie waiting in its depths, were quarried through disciplined theological meditation and patient discernment. It was not academics or aesthetes with too much time on their hands who did this work, but busy pastors, suffering martyrs, and bishops overseeing the evangelization of entire cities. As they preached and taught and suffered for the gospel, they worked out the deep logic of the revelation of the Trinity, the incarnation, and redemption. The more seriously they took the life-changing power of the good news, the more concentration they devoted to the details of sound doctrine.

Sanders, F., & Issler, K. (2007). Jesus in Trinitarian Perspective: An Introductory Christology (5). Nashville, TN: B&H Publishing Group.