This may seem like a question with an obvious answer to many Christians who have grown up believing in the Trinity. Trinitarian doctrine was developed after decades of debates over the nature of Christ and the Godhead in the early church beginning in the second century. But Paul lived in the first century and wrote his letters around the middle of that century. He was an observant Jew who came to have trust in Jesus as the Jewish Messiah. What did he think about the Messiah/Christ’s origins?
To understand the question adequately, one needs to review the beliefs of first-century Romans and Hellenized (Greek-acculturated) Jews with regard to the divine and earthly realms. Unlike the pervasive opinion today, the dividing line was rather porous between these two realities. Gods often crossed over into the mundane world of humans and humans were often known or believed to have been elevated into the divine realm. Their presence in the divine realm did not turn these beings into God (with a capital “G”). They may have been considered as gods or lesser divinities but they did not take on the identify of Zeus, Jupiter, or Yahweh. Daemons, angels, and other beings existed in the divine realm, according to common belief, without being God.
When early Jewish believers in Jesus the Messiah claimed that he had risen from the dead and was now seated at the right hand of God, they did not mean to say that he was God/Yahweh. They could not do so without violating their monotheistic, or better, henotheistic, beliefs. To say that Jesus was now divine, however, was not a violation of Jewish faith in Yahweh. Jews believed that a number of humans had been divinized in the past. Torah described Enoch as going to heaven (Gen. 5:24); 2 Kings 2:11 tells of Elijah’s ride into the next realm. Later Jewish traditions spoke of Moses ascending to heaven (Babylonian Talmud Yoma 4a; Pesikta Rabbati 20:4; Josephus, Antiquities 4:325-6). Jesus spoke of Abraham as residing there (Luke 16:19-31). This relocation did not make any of these patriarchs God. Neither was Jesus, strictly speaking, God, according to Paul.