Rabbi Aba remains awake all night in anticipation of a circumcision that will take place in the town during the morning. He then accompanies all the townspeople and the family of the child to be circumcised. A lengthy discourse on all the complex secrets and mysteries surrounding circumcision occurs in the Zohar. Circumcision pertains to the purification of the Sfirah of Yesod and its counterpart in the physical world, the sexual organ.
Circumcision is one of the most powerful cleansing actions available to us, and it is made available by learning these secrets and by meditating upon the words that comprise this portion.