How do we know that the redeemed can sing the new song?

The Bible explicitly states that the new song is sung by the 144,000 who are described as those 'redeemed from the earth.' This indicates that the song is exclusive to believers, highlighting their unique standing and relationship with Jesus Christ. The song is not something that can be learned or taught; it is an expression that arises naturally from the hearts of those who have been transformed by the blood of the Lamb. This underscores that authentic worship is rooted in the experience of redemption and grace, which only the elect possess.