You need a room with no view so imagination can meet memory in the dark.

One of the few things I know about writing is this: spend it all, shoot it, play it, lose it, all, right away, every time. Do not hoard what seems good for a later place in the book, or for another book; give it, give it all, give it now. [...] Anything you do not give freely and abundantly becomes lost to you.

If we are blinded by darkness, we are also blinded by light. When too much light falls on everything, a special terror results.