The apostle Peter offers a strong endorsement of Paul, referring to him as our beloved brother and acknowledging the wisdom given to him by God. Peter categorizes Paul's epistles alongside the other Scriptures, despite noting that some of his writings are hard to understand, often leading untaught and unstable individuals to twist their meaning to their own destruction. Peter's testimony, written after most of Paul's epistles, affirms Paul's status as a gifted writer inspired by God, countering critics who question Paul's apostleship based on private visions without external validation. While Peter does not explicitly call Paul an apostle, he does not dispute his position either, instead implicitly endorsing his letters with a caution about potential misunderstanding. Luke, Paul's traveling companion and the author of Acts, further validates Paul's credentials by directly naming him and Barnabas as apostles, sent forth with a divine message. Acts records the Lord declaring Paul a chosen vessel to bear His name before Gentiles, kings, and the children of Israel. Additionally, Luke chronicles Paul's miracles and the spread of God's Word through his bold preaching, including the impartation of the Holy Spirit to Gentiles at Ephesus through Paul's hands. The apostle John, as the last original apostle, provides no warning against Paul despite addressing various false teachings in his epistles. Similarly, Jude, in his short letter focused on false teachers, indirectly identifies Paul as an apostle of Jesus Christ by referencing his writings. Collectively, the support from Peter, Luke, John, and Jude underscores Paul's authenticity and divine commission, affirming his significant role in the early church.

The apostle Paul possessed a remarkable background that shaped his role as a significant contributor to the Scriptures. Born a Jew in Tarsus, a notable city in Cilicia, he described it as no obscure place, reflecting a sense of pride in his origins. Paul also held Roman citizenship, a valuable status likely inherited from his father, granting him certain privileges and protections. Though born in Tarsus, he was raised in Jerusalem under the tutelage of Gamaliel, a renowned Pharisaic teacher, where he was rigorously trained in the strict traditions of the Jewish law and displayed great zeal for God. Paul's early zeal manifested in his fierce persecution of the church, acting with authority from the council of elders to imprison and punish believers, even to the point of death. He boasted a formidable pedigree, being circumcised on the eighth day, of the stock of Israel, from the tribe of Benjamin, a Hebrew of the Hebrews, and as a Pharisee, blameless in the righteousness of the law. His progress in the Jewish religion surpassed many of his peers, earning him recognition and respect among contemporaries and elders alike for his exceeding zeal for the traditions of his fathers. This distinguished background stood in stark contrast to the original apostles, Peter and John, who were perceived as unlearned and ignorant by their peers, while Paul carried the outward appearance and demeanor of a man to be reckoned with. His reputation among the Jewish community was one of respect and authority, far different from the evaluation given to Jesus Himself or the twelve apostles. If Paul chose to trust in the flesh, he had ample reason to boast, yet his credentials served as a foundation for the dramatic transformation that followed his calling by God.

Paul defended his apostolic authority against challenges from critics in Corinth who questioned his right to teach, correct the congregation, and exercise leadership. He compared himself directly to those claiming similar standing by affirming shared Hebrew, Israelite, and Abrahamic descent while asserting greater credentials as a minister of Christ. These credentials were demonstrated through far more abundant labors, countless beatings, frequent imprisonments, repeated brushes with death, five instances of receiving thirty-nine lashes from Jewish authorities, three beatings with rods, one stoning, three shipwrecks, a night and day spent adrift at sea, constant journeys, and manifold perils from rivers, robbers, countrymen, Gentiles, cities, wilderness, sea, and false brethren. Additional marks included weariness, sleeplessness, hunger, thirst, fastings, cold, nakedness, and daily pressure arising from concern for all the churches, along with shared weakness toward the weak and burning indignation toward those made to stumble. Paul chose to boast only in these infirmities rather than in any outward advantages. This catalog of sufferings established the authenticity of his calling by revealing the depth of his dedication to serving Christ and the churches, directly countering accusations that he lacked legitimate standing to guide the congregation.

Philippians 3:5-6 introduces another son of Benjamin by listing the apostle Paul's own description of his qualifications: circumcised the eighth day, of the stock of Israel, of the tribe of Benjamin, a Hebrew of the Hebrews; concerning the law, a Pharisee; concerning zeal, persecuting the church; concerning the righteousness which is in the law, blameless. These credentials establish his identity as a Benjamite whose background aligned with the tribe's prophesied character of a ravenous wolf. The text connects this heritage directly to his early actions of consenting to Stephen's death, making havoc of the church by entering houses and imprisoning men and women, breathing threats and murder against the disciples, and seeking letters to bind followers of the Way. Yet the same passage shows how an encounter with Jesus transformed him from that persecuting zeal into immediate preaching that Christ is the Son of God, confounding opponents by proving Jesus is the Christ. This change fulfills the Deuteronomic prophecy that the beloved of the Lord would dwell in safety by Him, sheltered all the day long and dwelling between His shoulders, moving Paul from devouring the church to becoming one covered and protected by the Lord.

Paul asserts his apostolic credentials at the outset of Galatians to counter false teachers who claimed his message lacked divine authority because he had never met Jesus in person, witnessed His miracles, or received a commission comparable to that given the Twelve. He declares that his apostleship came neither from men nor through human appointment but directly from Jesus Christ and God the Father who raised Him from the dead, thereby placing himself on equal footing with the original apostles. This claim is reinforced by reference to his Damascus-road encounter as the moment of his commissioning and by explicit linkage to the risen and glorified Christ. Paul further defends the origin of his gospel, stating that it was neither patterned after human invention nor acquired through the rabbinic process of memorization and rote instruction nor received by ordinary classroom teaching. Instead it came by direct revelation from Jesus Christ, paralleling the experience granted the Twelve. He underscores that his preaching never sought to please men at the expense of truth, even while adapting his approach to gain a hearing. These assertions establish that both his office and his message possess the same divine source as the gospel preached by the other apostles. By securing this foundation Paul prepares the Galatians to receive his subsequent teaching on justification through faith in Christ's substitutionary sacrifice rather than through works of law or the syncretistic system of Gnostic-influenced Judaism. His credentials therefore serve the larger argument that the true gospel originates with God and delivers believers from the power of evil, not by human effort but according to the will and mercy of the Father.