"My dog doesn't worry about the meaning of life.  She may worry if she doesn't get her breakfast, but she doesn't sit around worrying whether she will get fulfilled or liberated or enlightened.  As long as she gets some food and a little affection, her life is fine.  But we human beings are not like dogs.  We have self-centered minds which get us into plenty of trouble.  If we do not come to understand the error in the way we think, our self-awareness, which is our greatest blessing, is also our downfall."