What does Luke 1:36 mean?
Mary has responded to news that she would conceive, apparently immediately, the very Son of God (Luke 1:31–33). Her initial reply was an entirely reasonable question. Fully believing it would happen, she naturally wondered how she, as a virgin, would come to be pregnant (Luke 1:34). Gabriel, the angel sent to deliver this message (Luke 1:26–27), tells Mary the conception will be the miraculous work of the Holy Spirit (Luke 1:35).To further reassure her, Gabriel also tells her about the good news he recently delivered to her relative, Elizabeth (Luke 1:5–7). She and her husband, the priest Zechariah, were aging and childless. In a personal encounter, Gabriel told Zechariah that his wife would finally bear a child, who would come to be known as John the Baptist (Luke 1:13–17). Elizabeth celebrated this, in part, as an end to the embarrassment which that culture assigned to childless women (Luke 1:24–25).
Gabriel's point of mentioning this happy news comes in the next verse (Luke 1:37). Elizabeth, once barren, will have a son. That which humanity finds impossible is possible for God (Luke 18:27).