"All of her heart, a meaningless phrase, but correct and precise, too. She used her heart to love him, not her head, and not her words and not her thoughts or ideas or feelings or any other vehicle or object or device people use to deliver love or love-like things. She used her heart, as a physical transmitter of love, and what came out of it was no more voluntary than gravity or time or time travel or the laws of fictional science itself."