Most importantly, is that we are walking in light ourselves so that our lives make those things clear. It's a shame even to speak of the things that are done by them in secret. It doesn't mean that we should never talk about them, but they're so bad that even when we have to talk about them, it's embarrassing. But all things that are exposed are made manifest by the light.
They're shown to be what they are by the light, because if something's going to make things clear, if something's going to manifest what's there, it's going to be.