The answer is: Angel of the Lord

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

Isn't it fascinating how the arrival of Jesus is presented within the story of Joseph? While the spotlight often shines on Mary, Joseph’s role gives us a glimpse into how God communicates through dreams and messengers! In Matthew 1:20-21, he gets an unexpected visit from the Angel of the Lord, who reassures him about his soon-to-be wife and narrows in on the monumental destiny of their child—saving his people from their sins.

The phrase "saving his people" is layered with meaning. It reflects back to Israel's historical struggles, such as their exodus from Egypt, where they were saved from slavery. Many followers of wisdom traditions empathize with the struggle against sin, likening it to oppressing forces in our lives. The term used in Greek, "sōzein," refers not just to spiritual salvation but includes physical healing and deliverance—an expansive view that challenges narrow interpretations of salvation.

An interesting echo to consider comes from other instances of divine messengers. In the Old Testament, we often see angels conveying pivotal news too—consider the birth of Isaac to Abraham and Sarah, where a visitor shared the delightful news that they would bear a son despite their age. In both cases, it paints a picture of unexpected joy emerging from perceived impossibilities, weaving a beautiful thread of hope throughout the biblical narrative.