What makes Miss Kinnian cry?

Miss Kinnian is overwhelmed by Charlie's unwavering belief in the goodness of people.

April 4-Miss Kinnian says Im learning fast. She read some of my progress reports and she looked at me kind of funny. She says Im a fine person and Ill show them all. I asked her why. She said never mind but I shouldnt feel bad if I find out that everybody isnt nice like I think. She said for a person who God gave so little to you did more than a lot of people with brains they never even used. I said that all my friends are smart people and their good. They like me and they never did anything that wasnt nice. Then she got something in her eye and she had to run out to the ladys room.