Charles Spurgeon Commentary Revelation 14:2-3

"And I heard a voice from heaven, as the voice of many waters, and as the voice of a great thunder: and the voice which I heard [was] as [the voice] of harpers harping with their harps: and they sing as it were a new song before the throne, and before the four living creatures and the elders: and no man could learn the song save the hundred and forty and four thousand, [even] they that had been purchased out of the earth." — Revelation 14:2-3 (ASV)

And I heard a voice from heaven, as the voice of many waters, and as the voice of a great thunder: and I heard the voice of harpers harping with their harps: and they sung as it were a new song before the throne, and before the four beasts, and the elders: and no man could learn that song but the hundred and forty and four thousand, which were redeemed from the earth.

Notice how loud their singing was—it was like many waters and great thunder. But notice, also, the sweetness of it, for it was melodious as the music of well-skilled harpers harping with their harps. Note, too, the freshness, the vivacity of it: they sang as it were a new song.

Shall we be there to sing that new song? If so, we must be redeemed from the earth, not with a general, but with a particular redemption, which lifts us up from the rest of our fellow creatures. We must also have attended the saved rehearsals, for none can sing in heaven but those who have learned the song; and none can learn it but those who are redeemed from the earth.