May

“It turned out that Cardan didn't have a heart of stone after all. As he removed his shirt and sank to his knees, as he fisted his hands and tried not to cry out when the strap fell, he burned with hatred. Hatred for Dain; for his father; for all his siblings who didn't take him on and the one who did; for his mother, who spat at his feet as she was led away; for stupid, disgusting mortals; for all of Elfhame and everyone in it. Hate that was so bright and hot that it was the first thing that truly warmed him. Hate that felt so good that he welcomed being consumed by it. Not a heart of stone, but a heart of fire.”
― Holly Black, How the King of Elfhame Learned to Hate Stories

“You didn’t get what you deserved, but you don’t have to live inside that one story forever. No one’s heart has to remain stone.”
― Holly Black, How the King of Elfhame Learned to Hate Stories

“A heart of stone can still be broken.”
― Holly Black, How the King of Elfhame Learned to Hate Stories

“You cannot save people who do not want to be saved," said Magnus. "You can only stand by their side and hope that when they wake and realize they need saving, you will be there to help them.”
― Cassandra Clare, Chain of Iron