“I always thought love made you stupid. Made you weak. A bad Shadowhunter. 'To love is to destroy.'I believed that[...]I used to think being a good warrior meant not caring,[...] And then I met you. You were a mundane. Weak. Not a fighter. Never trained[...] Love didn't make you weak, it made you stronger than anyone I'd ever met. And I realized I was the one who was weak.”
“I used to think being a good warrior meant not caring,” he said. “About anything, myself especially. I took every risk I could. I flung myself in the path of demons. I think I gave Alec a complex about what kind of fighter he was, just because he wanted to live.” Jace smiled unevenly. “And then I met you. You were a mundane. Weak. Not a fighter. Never trained. And then I saw how much you loved your mother, loved Simon, and how you’d walk into hell to save them. You did walk into that vampire hotel. Shadowhunters with a decade of experience wouldn’t have tried that. Love didn’t make you weak, it made you stronger than anyone I’d ever met. And I realized I was the one who was weak.” –Jace pg. 531-532”
“As if I could stop loving you. As if I would want to give up the thing that makes me stronger than anything else ever has. Since the first time I saw you, I have belonged to you completely.”
“In the end that was the choice you made, and it doesn't matter how hard it was to make it. It matters that you did.”
“Love isn't a weakness.”
“Love makes you a liar.”