I love you so much, so incredibly much," he went on, "and I forget when you're close to me, I forget who you are. I forget that you're Jem's. I'd have to be the worst sort of person to think what I'm thinking right now. But I am thinking it.

They say you cannot love two people equally at once,” she said. “And perhaps for others that is so. But you and Will—you are not like two ordinary people, two people who might have been jealous of each other, or who would have imagined my love for one of them diminished by my love of the other. You merged your souls when you were both children. I could not have loved Will so much if I had not loved you as well. And I could not love you as I do if I had not loved Will as I did.

Not all that is mortal is useless.

Most people are lucky to have even one great love in their life. You have found two.

He wanted to run to her, wrap her in his arms. Protect her. But it was Jem’s place to do those things, not his. Not his.” -Will Herondale

Perhaps you are a clockwork girl. Perhaps Mortmain’s warlock father built you, and now Mortmain seeks the secret of how to create such a perfect facsimile of life when all he can build are hideous monstrosities. Perhaps all that beats beneath your chest is a heart made of metal.’
Tessa drew in a breath, feeling momentarily dizzy. His soft voice was so convincing, and yet--’No,’ she said sharply. ‘You forget, I remember my childhood. Mechanical creatures do not change or grow. Nor would that explain my ability.’
‘I know,’ said Will with a grin that flashed white in the darkness. ‘I only wanted to see if I could convince you.’
Tessa looked at him steadily. ‘I am not the one who has no heart.