““I think you look on death as your friend,” she murmured. “That is a strange friend for a young man to have.”
“The only faithful friend in this world,” he said. “Death is always sure to be at your side.””

“Whenever a man's friends begin to compliment him about looking young, he may be sure that they think he is growing old.”

“A friend cannot be considered a friend unless he is tested on three occasions: in time of need, behind your back and after your death.”

“In the world you have three sorts of friends: your friends who love you, your friends who do not care about you and your friends who hate you.”

“Your friend Will is a good man, too, but I fear he's no longer an archer." "It would have been better, I sometimes think-" "If he had died? Wish death on no man, Thomas, it comes soon enough without a wish."”

“Isabelle," she said, lightening her tone with an obvious effort, "your loyalty to your friend is understandable --"
"He's not my friend." Isabelle looked over at Jace, who was staring at her in a sort of daze. "He's my brother.”

“And as I say to you, whenever you put a man on the Supreme Court, he ceases to be your friend, you can be sure of that.”

“Well, I hate to tell you this," she said, "but your friend is an asshole."
"He's not my friend," said Simon. "And I couldn't agree with you more, actually."
-Maia & Simon about Jace, pg.49-”

“My son," said he, "if every one in your case should shed tears as abundantly as you have done, the world would have been drowned in salt water by this time.
As for your friend, think not ill of him; no man loveth another who is always giving.”

“In a low whisper she was certain only her friend could
hear, she said, "I specifically remember we both promised never to drink from any man's goblet of wine. From the looks of you, Frances Catherine, I'm thinking you broke your word.”