Their 'magic' is Art, delivered from many of its human limitations.

For a while they stood there, like men on the edge of a sleep where nightmare lurks, holding it off, though they know that they can only come to morning through the shadows.

There is no curse in Elvish, Entish or the tongues of Men for this treachery!

I felt a curious thrill, as if something had stirred in me, half wakened from sleep. There was something very remote and strange and beautiful behind those words, if I could grasp it, far beyond ancient English.

Out of the darkness of my life, so much frustrated, I put before you the one great thing to love on earth: the Blessed Sacrament....There you will find romance, glory, honor, fidelity, and the true way of all your loves upon earth, and more than that: death: by the divine paradox, that which ends life, and demands the surrender of all, and yet by the taste (or foretaste) of which alone can what you seek in your earthly relationships (love, faithfulness, joy) be maintained, or take on that complexion of reality, of eternal endurance, that every man's heart desires

That was Thorin's style. He was an important dwarf. If he had been allowed, he would probably have gone on like this until he was out of breath, without telling anyone there anything that was not known already. But he was rudely interrupted.

Why must you speak your thoughts? Silence, if fair words stick in your throat, would serve all our ends better.