I don't usually do this but I am incapable of topping or adding to a post I just found here: http://www.abebooks.com/blog/index.php/2011/12/14/letter-of-advice-from-harper-lee/
"Letter of Advice from Harper Lee
"I love stories like this. People can sometimes go out of their way to be so lovely. This must have made that one reader’s whole month.
"In 2006, a young reader who loved the book To Kill a Mockingbird wrote a letter to 85-year-old author Harper Lee, in the hopes she would send him back a signed photo of herself.
"While Lee did not grant the photo request, she did respond, personally, in handwriting, and offered him life advice, instead:
I don’t have a picture of myself, so please accept these few lines:
As you grow up, always tell the truth, do no harm to others, and don’t think you are the most important being on earth. Rich or poor, you then can look anyone in the eye and say, “I’m probably no better than you, but I’m certainly your equal.”
(Signed, ‘Harper Lee’)”
"What an incredibly lucky fan. Not only did she give him some beautiful, sound advice, but frankly, Harper Lee’s signature usually costs quite a bit."