To drive the message home, they finally had an entire episode in season two about acceptance. Rachel thought about getting a nose job which even brought out latent insecurity about her former looks in the now prettiest girl in school. Very cool episode that ended with a rousing version of Ga Ga's anthem, Born This Way. Awesomeness!
I loved it, and it is helping me to evolve too. I would like to think I am learning to accept myself a lot more, fat and all. As for OTHERS, well, the relationship between Kurt and Blaine has helped me to be more comfortable with same sex relationships. I have always accepted them, but was a little squeemish when confronted with seeing actual PDA between them. That is lessening now too.
The show also teaches the importance of the arts in schools and in our lives. Just fantastic all around. My goal as I start on season three is to really take its message to heart, love myself more, accept the weird that makes me unique and try to be the best person I can be.