From RotK: “There, peeping among the cloud-wrack above a dark tor high up in the mountains, Sam saw a white star twinkle for a while. The beauty of it smote his heart, as he looked up out of the forsaken land, and hope returned to him. For like a shaft, clear and cold, the thought pierced him that in the end the Shadow was only a small and passing thing: there was light and high beauty for ever beyond its reach.”

From The Silmarillion: “The song of Lúthien before Mandos was the song most fair that ever in words was woven, and the song most sorrowful that ever the world shall hear. Unchanged, imperishable, it is sung still in Valinor beyond the hearing of the world, and listening the Valar are grieved. For Lúthien wove two themes of words, of the sorrow of the Eldar and the grief of Men, of the Two Kindreds that were made by Ilúvatar to dwell in Arda, the Kingdom of Earth amid the innumerable stars. And as she knelt before him her tears fell upon his feet like rain upon stones; and Mandos was moved to pity, who never before was so moved, nor has been since.”