In the chain of development, Yesod of Atik ends in the chest (Tiferet) of Arich Anpin; as clothed, it ends in Yesod of Arich.
According to the way the chain of development is arranged, Yesod of Atik ends in the chest of Arich Anpin and it is from there that its Kindnesses and Strengths go forth and are revealed. Afterwards it is from there that Abba and Imma, Israel Sabba and Tevunah, are built. However, in the order whereby one clothes another, Yesod of Atik ends in Yesod of Arich Anpin.
Following our discussion of the various aspects of Arich Anpin, we will now examine the Partzufim of Abba and Imma starting with their root.