The following work pretends to analyze the notion of ens in the work of Cardinal Cajetan (Thomas de Vio). In particular, we discuss two expressions which Cajetan introduced and could have a grip on the letter of Aristotle: esse essentiae and esse actualis existentiae. We also discuss the doctrinal origin of these expressions and the consequences of Cajetan's use of them in interpreting Thomas Aquinas.
Being; Cajetan; Aristotle; Thomas Aquinas