[The Squatter of Amon Rûdh]

I'm surprised that no-one's mentioned this one yet. I'm quite partial to it myself:

Then Beren lay upon the ground in a swoon, as one slain at once by bliss and grief; and he fell into a sleep as it were into an abyss of shadow, and waking he was cold as stone, and his heart barren and forsaken. And wandering in mind he groped as one that is stricken with sudden blindness, and seeks with hands to grasp the vanished light. Thus he began the payment of anguish for the fate that was laid on him; and in his fate Lúthien was caught, and being immortal she shared in his mortality, and being free received his chain; and her anguish was greater than any other of the Eldalië has known.