Four years ago, Angela Stimpson agreed to donate a kidney to a complete stranger.
"The only thing I knew about my recipient was that she was a female and she lived in Bakersfield, Calif.," Stimpson says.
It was a true act of altruism — Stimpson risked pain and suffering to help another. So why did she do it? It involved major surgery, her donation was anonymous, and she wasn't paid.
"At that time in my life, I was 42 years old. I was single, I had no children," Stimpson says. "I loved my life, but I would often question what my purpose is."