Apostles
Later in the Gospel narratives the twelve apostles are described as having been commissioned to preach the Gospel to "all the nations", regardless of whether Jew or Gentile. Paul emphasized the important role of the apostles in the church of God when he said that the household of God is "built upon the foundation of apostles and prophets, Christ Jesus himself being the cornerstone".
Although not one of the apostles commissioned during the life of Jesus, Paul, a Jew named Saul of Tarsus, claimed a special commission from the risen Jesus and is considered "the apostle of the Gentiles", for his missions to spread the gospel message after his conversion. In his writings, the epistles to Christian churches throughout the Levant, Paul did not restrict the term "apostle" to the Twelve, and often refers to his mentor Barnabas as an apostle. The restricted usage appears in the Revelation to John.
Martin Hengel
Within his studies of Rabbinic Judaism and the origins of Christianity, Hengel explored the perceived dichotomy between Judaism and Hellenism. In his study, "Judentum und Hellenismus", he documented that the designation of the apostle Paul exclusively as either Jewish or Hellenistic is a misunderstanding. Hengel argues in his writings that despite Paul’s controversial rhetoric scholars, along with Jewish and Christian communities, must recognize the historical value of Paul’s epistles and Luke’s account of Paul’s life within the Acts of the Apostles. Hengel recognizes the importance of this awareness because of the multifaceted insight provided about the Second Temple Era and Hellenistic Judaism of the first century within these texts.