The Silmarillion

by J.R.R. Tolkien

These were the choices that he gave to Lúthien. Because of her labours and her sorrow, she should be released from Mandos, and go to Valimar, there to dwell until the world’s end among the Valar, forgetting all griefs that her life had known. Thither Beren could not come. For it was not permitted to the Valar to withhold Death from him, which is the gift of Ilúvatar to Men. But the other choice was this: that she might return to Middle-earth, and take with her Beren, there to dwell again, but without certitude of life or joy. Then she would become mortal, and subject to a second death, even as he; and ere long she would leave the world for ever, and her beauty become only a memory in song. This doom she chose, forsaking the Blessed Realm, and putting aside all claim to kinship with those that dwell there; that thus whatever grief might lie in wait, the fates of Beren and Lúthien might be joined, and their paths lead together beyond the confines of the world. So it was that alone of the Eldalië she has died indeed, and left the world long ago. Yet in her choice the Two Kindreds have been joined; and she is the forerunner of many in whom the Eldar see yet, though all the world is changed, the likeness of Lúthien the beloved, whom they have lost.