Ha! Ha! My sadistic, twisted neurologist asked a similar question - although far more nastily. He sneered (and I quote), "You are so destroyed that I can't even fathom how you get out of bed in the morning."

My reply was, "That's because you aren't anybody's mommy." (I wanted to add, "dumba$$," but he was writing reports to my insurance company.)

Seriously, I keep going because, as banged up as I am, my child needs me. Without that external motivation, I don't know, quite honestly, if I could carry on.