Why Did Jesus Wash the Feet of His Disciples?

On the eve of His passion and subsequent crucifixion Jesus performed a wonderful act for His disciples.  He disrobed Himself and girt Himself about the waist with a towel.  He took a basin and filled it with water, and then He began to wash the feet of His disciples.  He (Jesus) truly is the Servant of Yahweh.  He truly is the Servant-Leader of His people.  Jesus demonstrated a marvelous new reality before and upon His disciples.  The New Reality requires that those who would belong to Jesus must be clean.  Those who would be in relationship with Jesus must be free of the pollution of the cosmos!