Shadowhunters saw the beauty in things mundanes created – the lights of the Ferris wheel reflecting off the ocean so brightly that it looked as if someone were setting off fireworks underwater: red, blue, green, purple, and gold – but they saw the darkness, too, the danger and the rot.”
-- Narrator (Chapter 1)

Importance: Emma is looking at the scenery and acknowledging that Shadowhunters, who live at the edge of the mundane world, are aware of it all though somewhat removed. The Shadowhunters are also able to see the beauty the mundanes create, though they see the negatives as well. This indicates a separation from the mundane world, as well as a connection.

The heat of their kiss was gone. And Emma was glad. It had seemed wrong to feel that, even the shadow of it, with anyone but Julian.”
-- Narrator (Chapter 3)

Importance: Emma and Mark have kissed, and Emma feels something with Mark, though not the love she...