We are taught that the Second Noble Truth teaches that the cause of suffering is craving or thirst (tanha). I see “thirst” as Gluttony because we continually search for something outside ourselves to make us happy. But no matter how successful we are, how rich or popular we are, we never remain satisfied.
The Buddha taught that this thirst grows from ignorance of the self. We go through life grabbing one thing after another to get a sense of security about ourselves. We attach not only to physical things or beings, but also to ideas and opinions about ourselves and the world around us. Then we grow frustrated when the world doesn’t behave the way we think it should and our lives don’t conform to our expectations, and we begin to look for something more to satisfy ur happiness.