[150] That which causes.
[151] That by which the cause causes.
[152] To say that the human soul can exist apart from the body, is no objection. Our soul is not merely a formal act; it is a subsistent being—that is, an act having its own intrinsic term, and therefore possessing an independent existence; which cannot be said of other forms. And on this account the soul is the only form which without impropriety might be called a formal cause as well as a formal principle.
[153] Are equal to a third.
[154] Are equal to each other.
[155] The formal principle which.
[156] The formal principle by which or through which.
[157] The formal reason.
[158] The product of reasoning.