Theodore and Orsisius are said to have helped Pachomius in the composition of his rule; Gennadius mentions another work: :
"Oresiesis the monk, a colleague of Pachomius and Theodore, perfectly learned in the Scriptures, composed a Divinely savoured book containing instruction for all monastic discipline, in which nearly the whole Old and New Testaments are explained in short dissertations in as far as they affect monks; and shortly before his death he gave this book to his brethren as his testament." This is supposed to be the work "Doctrina de institutione monachorum" translated by
St. Jerome into Latin.
Migne prints after it another work attributed to the same author: "De sex cogitationibus sanctorum libellus", which, however, is probably by a later Oresius. ==Sources==