"Let's examine the dog mind: Every time you come home, he thinks it's amazing. He can't believe that you've accomplished this again. You walk in the door. The joy of it almost kills him. "He's back again! It's that guy! It's that guy!""

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If one only wished to be happy, this could be easily accomplished; but we wish to be happier that other people, and this is always difficult, for we believe others to be happier than they are. you are comparing your lot with an ideal which is of course better and therefore you feel worse

— Baron de Montesquieu