Jesus was only “thought to be the son of Joseph.” By contrast, Mt 1:1–17, in the midst of a section from Joseph’s point of view (Mt 1–2), tracked Jesus’ legal lineage. This demonstrated His right to the throne of David through His adoptive father, Joseph. 3:23 Jesus began His ministry at about 30 years old—the age when a Levite began priestly service (Nu 4:46–47; see note at Lk 1:80). Thought to be the son of Joseph affirms the prophecy of the virgin birth of Jesus (see notes at 1:31–33 and 1:34–35).