None of this has anything to do with “metaphysics”. Metaphysics has to do with being as Being and God as God. Potency and act are part of a general science of nature. A general science of nature has to do with the beginnings of the epistemologies of the natural sciences. Understanding this would go a long way toward understanding the concepts everyone is trying to understand herein.
Potency and Act are the two parts - in as simple terms as possible - that define motion. There are definitions of motion that are much more complex, but, each of them use the term (one way or another) in the definition. There’s no doubt that motion is motion, but, that tells us little about what motion really is. Thus, motion, in its simplest definition is defined as, “The Act of the Potential precisely as Potential.” Upon understanding the terms, potency and act, we are able to construct a primary definition that is not tautological.
As youngsters, when we encounter an object that is new to us, we tend to scrutinize it to understand it as quickly and simply as possible. We peruse its geometry. We peruse its motion(s). We do not, at that point, undertake to slice it apart to try to understand a thing at its micro level. In fact, as human beings, we rarely understand most objects much beyond their most surface levels. To try to understand everything at each’s atomic level would, of course, consume too much time. Understanding objects by a perusal of their motions speeds up the knowing process and gives us sufficient knowledge of the objects that interest us whereby we are able to interact with the material world around us very smoothly and efficiently - most of the time.
So, to say that the concepts of Act and Potency are not important to us is to fail to understand how we Know. To fail to understand that these two concepts are supposed by us in our search for the more complex structures of the objects surrounding us, is to fail to know how we know. Typically, such a statement of it is a thoughtless and senseless assertion made by someone desperately trying to remove God from the equation as far as possible.
As human beings, we are surrounded by mobile things. When a mobile being is quiet, it is in potency. When it moves to another destination, or, point, it is in act. In the realm of coming-to-be, the same is true. An acorn is in potency to become an oak tree. Whether it can become something else, by the intervention of man and his science, is beside the point. In its natural state, acorns dropping on the ground all over the world will for the most part develop into oak trees, not Polar Bears or water melons. It it were not so, our would would be a world of pure chaos.
The philosophy that includes potency and actuality is the beginnings of the more complex philosophies, just as in science, it is the beginnings of the more complex sciences. Simply because the concepts are relegated to a point, in our thinking, that is at the level of presupposition, does not mean that it is not of value, nor does it mean that it is not there, underlying our thought processes.
jd