This one is kind of cheating, it's not a quote or a lyric, just a word i discovered recently and loved.
An empathetic state of happiness and joy experienced when another individual experiences happiness and joy. It is sometimes identified with parents' pride in their children's accomplishments or one's own excitement for friends' and others' successes. It is commonly used to describe when a person experiences positive feelings when a lover is enjoying another relationship. It is an opposite of jealousy.