This text examines the relationship between faith and philosophy, taking as its starting point Heidegger's provocative claim that "Christian philosophy is a square circle." The author critically evaluates Heidegger's interpretation of the Apostle Paul as a representative of an "original faith" that purportedly rejects Greek wisdom. The analysis demonstrates that Paul, as a Hellenized Jew, was instead a pivotal figure who began to theoretically reflect on faith by integrating Greek conceptual frameworks. While Jesus' teachings followed the prophetic tradition without abstract theory, Paul's writings represent the introduction of Hellenistic thought into the interpretation of the Christian message. The text argues that the apparent contradiction between the "foolishness" of the Gospel and worldly wisdom was a historical misunderstanding that Paul himself actively sought to overcome. This reflection on faith laid the groundwork for the development of Christian thought as a theoretical discipline. The study highlights the mutual influence between the prophetic tradition and Greek philosophy in shaping the foundations of the Western intellectual tradition.