Next to the apostle Paul, Luke is the best-known author in the New Testament. Yet, he is more than likely the one we know the least. As a physician, we know Luke was from a well-to-do family. Excellence in Greek grammar demonstrates he was well educated. How and where he came into the company of Paul, we know not. We do know that by the time Paul arrived in Troas, Luke was part of the entourage. This fact is evinced when Luke's writing turns from...