When you don't feel well, you can't ever be at your BEST. At least this is my experience living with Crohn's disease. When I physically don't feel well, I notice I tend to care less about how I appear on the outside. How I feel on the inside gets my full attention because I have limited physical energy and effort to put into other things. So I choose to focus my efforts on what I think is most important. And in my brain, that will always be trying to heal my insides, both body and mind.
Think to yourself "what if all these little moments in my life were magnified and took three times as long to accomplish". Then you might have an idea of what I'm talking about. It becomes a logistical nightmare, dealing with the trickle-down bits and pieces while waging war on the disease itself! But we do it.