§ Akallabêth The Silmarillion

For the Dúnedain held that even mortal Men, if so blessed, might look upon other times than those of their bodies' life; and they longed ever to escape from the shadows of their exile and to see in some fashion fee light that dies not; for the sorrow of the thought of death had pursued them over the deeps of the sea. Thus it was that great mariners among them would still search the empty seas, hoping to come upon the Isle of Meneltarma, and there to see a vision of things that were. But they found it not. And those that sailed far came only to the new lands, and found them like to the old lands, and subject to death. And those that sailed furthest set but a girdle about the Earth and returned weary at last to the place of their beginning; and they said: