Introduction We find the term “act” and its derivations; “action”, “actual”, “actuality”, “change and movement”, “living”, “existence”, “labor” “praxis”, etc., at the center of the history of the philosophy of the 20th Century. The concept “act” which appears in the metaphysics o Aristotle and then in the metaphysics of Scholasticism, from Latin actus “a doing or a driving, impulse; a part in a...

the first conceptions of intellect are a beign and an essence, we must begin exploring how they are related to each other. everything that receives   something from another is potential with regard to what it receives and what is receives in it is the actuality. thus st.thomas returns to the doctrine of potency and act of being to explain the relation of a being and an essence by developing in ...