By the analysis of a specific type of Jesuitical correspondence - the Litterae Indipetae -, a dynamism of the experience's elaboration was outstanding, revealing a modus vivendi (way of living) based on Aristotelic-Thomist philosophical psychology, name under which this praxis has been usually referred to. This article is dedicated to this lived experience described in the letters and to this specific modus vivendi (with its due basic implications), searching to answer this question: in which measure does the category of knowledge of himself expressed, starting from proper common place as specific type of letters and of the way of thinking of the Jesuits (in a particular historical-cultural-institutional scope) can be of interest to modern psychology? It results from this inquiry that the elaboration of the experience of knowledge of himself, in this scope, starts from the assumption that man is an unit (body and soul, reason and faith, sensation and intellection) and that, living in an orderly way (in itself and in the world that surrounds it), fulfills its being by analogy to the Holy Being.
knowledge of himself; philosophical psychology; society of jesus; litterae indipetae