Besides, we are on vacation. Carpe diem. Seize the day, not the demons.”
-- Magnus (chapter 2)

Importance: Magus is explaining to Alec why they should not try to follow up on a situation involving demons and Shadowhunters. This is typical of Magnus' humor and attitude toward things. Alec agrees in this situation and they move on with their vacation for a short while.

The world is sometimes unkind to warlocks. Sometimes we feel a temptation to be unkind back.”
-- Magnus (chapter 4)

Importance: Magnus has discovered he has memories missing, and it makes him wonder if he played a role in establishing the organization known as the Crimson Hand. He offers this statement to Alec to explain why he might have been tempted to do so.

Odd, to see the compass of Alec's soul swing around surely and point home. The compass of Magnus's soul spun freely within him, and he'd long been used to that.”
-- Narrator (chapter 7)

Importance: Magnus and...