Book: It's hard to be younger

We, the dark, beat the enemy at once. And the light you will smile. Politely nod, agreeing with your statement, and then when you momentarily turn away, stick a dagger in your shoulder, hypocritically stating that it was done for Good!

I hate traitors and this horrible feeling of powerlessness! Although... there is one way out. And for either all or for one...

As is often said the father, we must know who and what breathes and lives