“You have to do what you think is the right thing, but just make sure it's the right thing in the long run, and not just for the moment. Your war memories will be with you forever, you'll be asked about them thousands of times after the war is over.”

“Sometimes in life, you have to make things happen. That you can change your life if you're willing to let go of the old and actively look for the new. That even if you're on the right track, you'll get run over if you just sit there.”

“Not making a decision is the worst thing you can do. So long as you feel you made the right decision based on the information you had at that time, there's no need to fret about it. If it fails, you'll know what to do next time.”

“Do the things that interest you and do them with all your heart. Don't be concerned about whether people are watching you or criticizing you. The chances are that they aren't paying any attention to you. It's your attention to yourself that is so stultifying. But you have to disregard yourself as completely as possible. If you fail the first time then you'll just have to try harder the second time. After all, there's no real reason why you should fail. Just stop thinking about yourself.”

“You're a disaster for us, Clary! You're a mundane, you'll always be one, you'll never be a Shadowhunter! You don't know how to think like we do, think about what's best for everyone-- all you think about is yourself! But there's a war now, or there will be, and I don't have time or the inclination to follow around after you, trying to make sure you don't get us killed! Go home, Clary. Go home!”

“Just because you have the right to do something, doesn't make it the right thing to do.”