Friendship lessons

At the end of Friendship is Magic: Part 2 (The Elements of Harmony), Princess Celestia gives Twilight a new mission: To study the magic of friendship and report her findings. Most likely, this is a way for Celestia to allow her pupil to stay with her friends in Ponyville. Since then, the end of each episode featured Twilight relaying a report on friendship and, whether by experiencing it herself or by observing others.

The Ticket Master:
Dear Princess Celestia,

''I learned that one of the joys of friendship is sharing your blessings. But when there's not enought blessing to go around, having more than your friend's can make you feel pretty awful.''

Griffon the Brush-off:
Dearest Princess Celestia,

''Today I learned that it's hard to accept when some pony you like wants to spend time with some pony who is not so nice. Though it's impossible to control who your friends hang out with, it is possible to control your own behavior. Just continue to be a good friend. In the end, the difference between a false friend and one that is true will surely come to light.''

Swarm of the Century:
''I've learned that, sometimes, the solution to your problems can come from where you least expect it. It's a good idea to stop and listen to your friends opinions and perspectives... Even when they don't always make any sense...''
 * Princess Celestia: Before I have to go, would you care to give me your latest report, on the magic of friendship, in person?
 * Twilight: My... report?
 * Princess Celestia: Haven't you learned anything about friendship?
 * Twilight: (watches Pinkie Pie) ...Actually, I have...

Call of the Cutie:
Dearest Princess Celestia,

''I am happy to report that one of your youngest subjects has learn a valuable lesson about friendship. Sometimes, the thing you think will cause you to lose friends and feel left out can actually be the thing that helps you make your closest friends and realize how special you are...''