Eventually, I stopped thinking about the money as something I had lost and began remembering it for what it had allowed me to do. I had helped someone through a frightening period without demanding explanations or making her feel indebted. She had remembered that kindness and found a way to thank me when she no longer could do so in person.

I still wish she had told me about her illness. I wish I could have said goodbye and assured her that she never needed to feel embarrassed about asking for help. But I no longer hold her departure against her. I understand that she had been facing something deeply personal, and perhaps keeping it private was the only way she knew how to cope. Her final letter taught me that kindness is not always followed by an immediate thank-you, and sometimes we never learn what our actions meant to another person. I had once believed my neighbor had simply taken advantage of my trust. Now I remember her as someone who was struggling quietly and who never forgot the person who made her feel less alone. The $15,000 was her final gift, but the lesson she left me was worth far more: never underestimate the difference a little compassion can make in someone’s life.