Oprah Winfrey's commencement speech at USC wasn't related to peaceful parenting, since she was talking to new journalists and communicators, but in terms of feeding your own soul, she had a few great comments. I think it's worth a listen, and I love her, so you might track down some of her other commencement speeches as well. She might just fill you up a little bit. 

Here is one of the quotes I found moving:

"Who will you be if you don't care enough to try? What mountains could we move if we were to join forces and work together in service for something greater than ourselves. Pick a problem, any problem, and do something about it. Because, to somebody who is hurting, "something" is everything."