1:23 virgin. See note Is. 7:14. Jesus’ conception by a virgin is miraculous, announcing that God will soon redeem His people and is present with them. This quotation is the first of a number of Old Testament references Matthew uses to show that Jesus fulfills the Old Testament (2:6, 15, 18, 23 and notes). In the entire Gospel there are twelve such fulfillment formulas, and more than fifty Old Testament quotations. See “The Virgin Birth of Jesus” at Luke 1:27.