Mary of Nazareth, the mother of Jesus Christ, is one of the most venerated women from the ancient world. Her most common epithet is "the virgin Mary." She is celebrated by Eastern Orthodox Churches, Catholicism, and various Protestant denominations as "the mother of God." In Islam, Surah 19 of the Quran, the surah of Maryam, is devoted to her.
Stories of Mary evolved over time. Our earliest source for Christianity are the letters of Paul the Apostle to the Gentiles. Written before the canonical gospels, Paul did not name her. We have only: "But when the fullness of time had come, God sent his son, born of a woman, born under the law" (Galatians 4:4).
Ancient cultures shared a conviction that great people often had a miraculous birth, usually with the mating of a god with a human woman.
The gospels of Mark, Matthew, Luke, and John (70-100 CE) are our sources for Mary. Confusing at times, there are many women named Mary in the gospels. Then (as now) people named their children after famous figures. The name Mary derived from the Aramaic Mariam, in koine Greek, Maria. Miriam was the sister of Moses.
The earliest gospel, Mark (c. 70 CE), began in medias res, with the adult Jesus beginning his ministry in Nazareth:
On the Sabbath he began to teach in the synagogue, and many who heard him were astounded. They said, "Where did this man get all this? What is this wisdom that has been given to him? What deeds of power are being done by his hands! Is not this the carpenter, the son of Mary and brother of James and Joses and Judas and Simon, and are not his sisters here with us?" And they took offense at him.
Although not described as a follower in the earthly ministry, we know that his brother James was a historical figure because Paul visited with him twice, and he is referred to as "James, the Lord's brother" in Galatians 1:18. In Acts, James is one of the leaders of the new movement in Jerusalem. Early Christianity understood the siblings as other children of Mary after the birth of Christ.
Matthew and Luke both began their gospels with a nativity story (a birth story) of Jesus. The motivation was most likely to convince people that Jesus was the messiah, predicted by the prophets of Israel. They did this through references to the books of the prophets in the Jewish scriptures. At the same time, ancient cultures shared a conviction that great people often had a miraculous birth, usually with the mating of a god with a human woman.
Matthew's gospel describes the birth of Jesus as follows:
Now the birth of Jesus the messiah took place in this way. When his mother Mary had been engaged to Joseph, but before they lived together, she was found to be pregnant from the holy spirit. Her husband Joseph, being a righteous man and unwilling to expose her to public disgrace, planned to divorce her quietly. But just when he had resolved to do this, an angel of the Lord appeared to him in a dream and said, "Joseph, son of David, do not be afraid to take Mary as your wife, for the child conceived in her is from the holy spirit." All this took place to fulfill what had been spoken by the Lord through the prophet: "Look, the virgin shall become pregnant and give birth to a son, and they shall name him Emmanuel," which means, "God is with us." When Joseph awoke from sleep, he did as the angel of the Lord commanded him; he took her as his wife but had no marital relations with her until she had given birth to a son, and he named him Jesus."
The holy spirit at this point was not the third entity of what became the Trinity in 325 CE. It was a reference to the spirit of God, which animated Adam when he "breathed into his nostrils the breath of life, and the man became a living being" (Genesis 2:7). It was the spirit of God that possessed the prophets with the ability to speak in God's name and perform miracles.
Readers are sometimes confused with a reference to divorce, as they were not married yet. Both betrothals and marriages were done through a legal contract, exchanging the property of the father to the new husband. To undo an original contract, another contract, that of divorce, was required.