We have the power to choose our responses and reactions to our circumstances, and therefore, can influence our circumstances.

The definition of insanity (I prefer dysfunctional):

Doing the same thing over and over again expecting a different result.
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It's a heroes journey, and you are the hero.

Loving Kindness Meditation will dramatically improve your spirits; give it a try for just 3 days: http://www.youtube.com/watch?v=sz7cpV7ERsM