“Magnus took a deep breath and spoke gently. “Will. You asked me for my wisdom, as someone who has lived many lifetimes and buried many loves. I can tell you that the end of a life is the sum of the love that was lived in it, that whatever you think you have sworn, being here at the end of Jem’s life is not what is important. It was being here for every other moment. Since you met him, you have never left him and never not loved him. That is what matters.”

“But you are not,” Magnus said. “He is not dead, Will. He lives because you let him go. He would have stayed with you and died, if you had asked it, but you loved him enough to prefer that he live, even if that life is separate from yours. And that above all things proves that you are not Sydney Carton, Will, that yours is not the kind of love that can be redeemed only through destruction. It is what I saw in you, what I have always seen in you, what made me want to help you. That you are not despairing. That you have in you an infinite capacity for joy.” He put one gloved hand under Will’s chin and lifted Will’s face. There were not many people Will had to raise his head to look in the eye, but Magnus was one. “Bright star,” Magnus said, and his eyes were thoughtful, as if he were remembering something, or someone. “Those of you who are mortal, you burn so fiercely. And you fiercer than most, Will. I will not ever forget you.”

“I can tell you that the end of life is the some of the love that was lived in it.”

“Will and Tessa were in the carriage now, and their driver was snapping the reins. 'Do you think there’s a chance for him?''A chance for who?''Will Herondale. To be happy.'Woolsey sighed gustily and put down his glass. 'Is there a chance for you to be happy if he isn’t?'Magnus said nothing.'Are you in love with him?' Woolsey asked—all curiosity, no jealousy. Magnus wondered what it was like to have a heart like that, or rather to have no heart at all.'No,' Magnus said. 'I have wondered that, but no. It is something else. I feel that I owe him. I have heard it said that when you save a life, you are responsible for that life. I feel I am responsible for that boy. If he never finds happiness, I will feel I have failed him. If he cannot have that girl he loves, I will feel I have failed him. If I cannot keep his parabatai by him, I will feel I failed him.”

“You remember what else I said to you that day in the drawing room,” he said. “I want you to be happy, and him to be happy. And yet when you walk that aisle to meet him and join yourselves forever you will walk an invisible path of the shards of my heart, Tessa. I would give over my own life for either of yours. I would give over my own life for your happiness. I thought perhaps that when you told me you did not love me that my own feelings would fall away and atrophy, but they have not. They have grown every day. I love you now more desperately, this moment, than I have ever loved you before, and in an hour I will love you more than that. It is unfair to tell you this, I know, when you can do nothing about it.” He took a shuddering breath. “How you must despise me.”

“Haven’t I?” Magnus said, and then smiled at him. “Will, you treat me as a human being, a person like yourself; rare is the Shadowhunter who treats a warlock like that. I am not so heartless that I would call in a favor from a brokenhearted boy. One who I think, by the way, will be a very good man someday. So I will tell you this. I will stay here when you go, and I will watch over your Jem for you, and if he wakes, I will tell him where you went, and that it was for him. And I will do what I can to preserve his life: I do not have yin fen, but I do have magic, and perhaps there is something in an old spell book I might find that can help him.”

“No." Magnus strode toward him. "I didn't call you because I'm tired of you only wanting me around when you need something. I'm tired of watching you be in love with someone else-someone, incidentally, who will never love you back. Not the way I do.”