In point of fact, whatever one makes of oneself, one becomes that. The source of happiness or unhappiness is all in man himself. When he is unaware of this, he is not able to arrange his life, but as he becomes more acquainted with this secret he gains mastery, and the process by which this mastery is attained is the only fulfillment of the purpose of this life. It is this process which is explained by Attar in his description of the seven valleys through which this Bird of the Sky has passed.