The Silmarillion

And thus the fear of Yavanna that the Silmarils would be swallowed up and fall into nothingness did not come to pass; but they remained in the power of Morgoth. And he being freed gathered again all his servants that he could find, and came to the ruins of Angband. There he delved anew his vast vaults and dungeons, and above their gates he reared the threefold peaks of Thangorodrim, and a great reek of dark smoke was ever wreathed about them. There countless became the hosts of his beasts and his demons, and the race of the Orcs, bred long before, grew and multiplied in the bowels of the earth. Dark now fell the shadow on Beleriand, as is told hereafter, but in Angband Morgoth forged for himself a great crown of iron, and he called himself King of the World. In token of this he set the Silmarils in his crown. His hands were burned black by the touch of those hallowed jewels, and black they remained ever after; nor was he ever free from the pain of the burning, and the anger of the pain. That crown he never took from his head, though its weight became a deadly weariness. Never but once only did he depart for a while secretly from his domain in the North; seldom indeed did he leave the deep places of his fortress, but governed his armies from his northern throne. And once only also did he himself wield weapon, while his realm lasted.

For now, more than in the days of Utumno ere his pride was humbled, his hatred devoured him, and in the domination of his servants and the inspiring of them with lust of evil he spent his spirit. Nonetheless his majesty as one of the Valar long remained, though turned to terror, and before his face all save the mightiest sank into a dark pit of fear.

Now when it was known that Morgoth had escaped from Valinor and pursuit was unavailing, the Valar remained long seated in darkness in the Ring of Doom, and the Maiar and the Vanyar stood beside them and wept; but the Noldor for the most part returned to Tirion and mourned for the darkening of their fair city. Through the dim ravine of the Calacirya fogs drifted in from the shadowy seas and mantled its towers, and the lamp of the Mindon burned pale in the gloom.

Then suddenly Fëanor appeared in the city and called on all to come to the high court of the King upon the summit of Túna; but the doom of banishment that had been laid upon him was not yet lifted, and he rebelled against the Valar. A great multitude gathered swiftly, therefore, to hear what he would say; and the hill and an the stairs and streets that climbed upon it were lit with the light of many torches that each one bore in hand. Fëanor was a master of words, and his tongue had great power over hearts when he would use it; and that night he made a speech before the Noldor which they ever remembered. Fierce and few were his words, and filled with anger and pride; and hearing them the Noldor were stirred to madness. His wrath and his hate were given most to Morgoth, and yet well nigh all that he said came from the very lies of Morgoth himself; but he was distraught with grief for the slaying of his father, and with anguish for the rape of the Silmarils. He claimed now the kingship of all the Noldor, since Finwë was dead, and he scorned the decrees of the Valar.

'Why, O people of the Noldor,' he cried, 'why should we longer serve the jealous Valar, who cannot keep us nor even their own realm secure from their Enemy? And though he be now their foe, are not they and he of one kin? Vengeance calls me hence, but even were it otherwise I would not dwell longer in the same land with the kin of my father's slayer and of the thief of my treasure. Yet I am not the only valiant in this valiant people. And have ye not all lost your King? And what else have ye not lost, cooped here in a narrow land between the mountains and the sea?

'Here once was light, that the Valar begrudged to Middle-earth, but now dark levels all. Shall we mourn here deedless for ever, a shadow-folk, mist-haunting, dropping vain tears in the thankless sea? Or shall we return to our home? In Cuiviénen sweet ran the waters under unclouded stars, and wide lands lay about, where a free people might walk. There they lie still and await us who in our folly forsook them. Come away! Let the cowards keep this city!'