The Roman Catholic teaching that Mary, the mother of Jesus, supposedly did not have a sin nature and was, in fact, sinless. Yet this belief is not supported by Scripture. Although she was a godly woman the Bible states clearly that only Jesus was sinless, (on the cross our sin was put on Him) while every other person is tainted with sin (Ps 51:5; Rom 3:23; 2 Cor 5:21; 1 Pet 2:22,24; 1 Jn 3:5). This belief is not to be confused with the miraculous conception and birth of her son, Jesus, while she was still a virgin (Mt 1:18-25). The virgin birth of Jesus is a foundational truth of Christianity.