The Christmas story reveals God's pattern of choosing humble, overlooked people to accomplish His greatest works. When announcing the Messiah's birth, God chose shepherds, a young village girl named Mary, and an aging priest named Zechariah rather than powerful leaders. Mary's deep knowledge of Scripture enabled her to trust God's impossible promise and respond with joyful obedience. Zechariah initially doubted but later prophesied about serving God without fear through the coming Messiah. Their responses teach us that knowing God's Word builds the trust necessary for faithful obedience. Just as Christ's first coming guarantees His second coming, we can trust God's promises and participate in His kingdom work through humble faith.