Chapter one is the linage of the of the Lord Jesus. Mary his mother was impregnated by the Holy Spirit. Joseph her soon to be husband was going to divorce her secretly but the Angel of the came to him said do not be afraid. Mary has conceived by the Holy Spirit,she will have a son who will save His people from sin.You will call him Jesus. This fulfills what was spoken by the prophet saying Behold a virgin will bring forth a son and they shall call his name Immanuel, God is with us.