Amicitia Spiritualis By Br. Anthony VanBerkum, O.P.|2016-10-24T19:05:35-04:00October 24, 2016| Amicitia Spiritualis About this Brother: Br. Anthony VanBerkum, O.P. Br. Anthony VanBerkum entered the Order in 2013. Before entering, he studied Physics at Stanford University. On DominicanFriars.org