Why is the angel's song significant for Christians?

The angel's song is significant as it embodies the core of the Christian faith—God's glory and the promise of peace through Jesus Christ. In the proclamation, 'Glory to God in the highest, and on earth peace, good will toward men' (Luke 2:14), we see a comprehensive picture of God's redemptive plan. It emphasizes how God's love and mercy have secured peace for a rebellious humanity, offering reconciliation to those estranged from Him. Moreover, it encourages believers to join in worship and praise, recognizing that true joy springs from understanding and accepting the grace offered through Christ’s incarnation.