An ex girl friend of mine taught me this one. Life keeps giving us the same lesson until we learn it then we move on to the next.
This girl was an awesome person. She is probably one of the most intelligent ppl I've known. She had two masters and 2 bachelor degrees. I don't think I've ever found anyone so interesting to talk to, but.... there is always a "but", she was crazy. Wild, unpredictable crazy. Anyway last I heard she had a affair with and then married her best friend's husband.