Friendship expressed itself through Pier Damiani抯 extremely dense series of relationships with a throng of interlocutors, to begin with those from his own community and to end up with the monks from Cassino and Cluny. A special emotional sensibility and the sharing of peculiar ascetic and penitential habits underlied the binding force which led the restricted circle of Damianite ascetics to develop, around the passion of Jesus, a theology to try and live on their own flesh. As of the years 60 in the XI century it tried to extend its proposal of ascetic perfection, particularly to the Cassino monasticism.