Cassandra Clare said this quote

Even the girl he'd danced with had thought it was some marvelous trick. She had been enveloped in real, bright fire and she had tipped back her head and laughed, the tumble of her black hair becoming a crackling waterfall of light, the heels of her shoes striking sparks like glittering leaping dust all over the floor, her skirt trailing flame as if he were following a phoenix tail. Magnus had spun and swung with her, and she'd thought he was marvelous for a single moment of bright illusion. But, like love, fire didn't last.