I never felt like that before. Maybe it could be depression, like you get. I can understand how you suffer now when you're depressed; I always thought you liked it and I thought you could have snapped yourself out any time, if not alone then by means of the mood organ. But when you get that depressed you don't care. Apathy, because you've lost a sense of worth. It doesn't matter whether you feel better because you have no worth.

Philip K. Dick