Alec," Magnus said. He put a hand on his boyfriend’s shoulder; Alec was standing still, staring angrily at the floor. "Are you okay?" Alec looked at him. "Who are you again?" Magnus gave a little gasp; he looked — for the first time Simon could remember — actually unnerved. It lasted only a moment, but it was there. "Alexander," he said. "Too soon to joke about the happy memory thing, I take it," Alec said.

Life was an uncertain thing, and there were some moments one wished to remember, to imprint upon one's mind that the memory might be taken out later, like a flower pressed between the pages of a book, and admired and recollected anew. - Sophie and Gideon Lightwood

As long as there is love and memory, there is no true loss.

Hugo attacked me." Clary tried not to wince as the astringent liquid stung her wounds. Hugo?" Luke blinked. Hodge's bird. I think it was his bird, anyway. Maybe it was Valentine's." Hugin," Luke said softly. "Hugin and Munin were Valentine's pet birds. Their names mean 'Thought' and 'Memory.'" Well they should mean 'Attack' and 'Kill,'" said Clary. "Hugo almost tore my eyes out.