 But as the same reality may be called "actuality" when viewed in the light of what precedes, and "potentiality" when viewed in the light of what follows (see "actus et potentia"), the meaning of the term "first actuality" may vary according to the view one takes, and the point where the series is made to begin.Primary matter (see matter and form) is a pure potentiality, and the substantial form is its first determination, its first actuality.The complete substance constituted by these two principles receives further determinations, which are, in that respect, second actualities.