Before the operation on my left hand I wasn't able to stretch my fingers open all the way. I've never had very big hands, but I could do the splits with them. Eventually I couldn't any more. I had a twisted tendon in my little finger that prevented me from being able to stretch.
Ultimately, all human activities have as their goal the realization of happiness. Why, then, have we ended up producing the opposite result? Could the underlying cause be our failure to correctly understand the true nature of happiness?