Capriciousness, I don't think all of you is gone. I think that there still is a spark left. I think you can recover the rest of it.

I recommend that you read...and read...and then read some more. Read "everything you can get your hands on" until you find a topic or issue that really interests or inspires you. Then, read more about that.

If you live near a university or community college, see if you can enroll in a philosophy class. I find that my depth is best rediscovered and let out in philosophy. In class, you'll be forced to confront big issues, and you might find that that intriguing moody girl that you were in the early course of your illness suddenly wants to come back because she has a lot to say.

You should also try to pursue a creative endeavor. Take music lessons, learn to knit, write fictional stories...

All while being gentle with yourself so that you don't get burnt out! It's a tough balance, a delicate one, and not an easy thing to do at all. I'm currently dealing with a similar problem, and it is so much easier to know what I ought to be doing than it is to do it. But I'd like to believe that we will succeed because we need to. Our true existence depends on this. We won't give up.

Good luck.