Analysis of information sources in references of the Wikipedia article "Martin Hengel" in English language version.
Contrary to a widespread anti-Lukan scholasticism which is often relatively ignorant of ancient historiography, I regard Acts as a work that was composed soon after the Third Gospel by Luke 'the beloved physician' (Col. 4:14), who accompanied Paul on his travels from the journey with the collection to Jerusalem onwards. In other words, as at least in part an eye-witness account for the late period of the apostle, about which we no longer have any information from the letters, it is a first-hand source.