Thematic Bible: Alone can learn the songs of heaven

And they sing as a new song before the throne, and before the four living creatures, and the elders: and none could learn the song, except the hundred forty-four thousand, purchased from the earth. There are they who were not contaminated by women; for they are virgins. These are they following the Lamb wherever he should lead. These were purchased from men, first fruits to God and the Lamb.