The answer is: Angel of the Lord

Matthew 1:20-21 - this was to be Jesus' great work, to save people from their sins.

In the story surrounding the birth of Jesus, the angelic messenger serves as a bridge between the divine plan and human understanding. This interplay between heaven and earth is a thrilling part of spiritual narratives! In Matthew 1:20-21, the angel's announcement to Joseph crystallizes the purpose and identity of Jesus right at the outset of the Gospel — and there's no doubt about the gravity of this mission. Saving people from their sins covers a lot more ground than just a moment of confession; it suggests a transformative journey toward wholeness.

Joseph's quiet compliance is equally stirring. While Mary could be seen as an emblem of faith with her "be it unto me," Joseph's initial response is one of hesitation — but don't underestimate this! His dream encounter showcases how even a righteous man can have doubts, proving that personal journeys of faith can be full of complex emotions.

Interestingly, the name "Jesus" itself reflects the rescue mission outlined by the angel; it derives from the Hebrew name "Yeshua," which means "to deliver" or "to rescue." This isn't just a chance event; scripturally, it resonates with a multitude of stories from the Hebrew Bible where figures like Moses also delivered their people from oppression. Each character reveals layers of purpose and divine intent, reaffirming a beautiful thematic thread woven throughout biblical texts. So next time you ponder this tale, remember, it’s less about grand sweeps of prophecy and more a relatable story of divine guidance and individual response!