When you get an email like this, it makes it all worthwhile. (The edits are mine, to protect the girl's privacy.)

Dear Hannah and Kevin Salwen,

Yesterday, the 19th, you two came to talk at my school, XXX, in New York. Before then I have dreamed of living in a huge mansion and marrying a millionaire. But now, I see that the world is a largely connected community. I owe that to you. Today, I took out clothing from my closets that were too small or that I didn't wear. I hope they go to helpful organizations. I have one question (if you know the answer): Is Smile Train a good organization to donate to? Anyway, I wanted you to know what your family did was truly amazing. You're making a difference!
Sincerely,
CC