I answer that, Counsel is a kind of inquiry, as stated above (Article [1]). But we are wont to inquire about things that admit of doubt; hence the process of inquiry, which is called an argument, "is a reason that attests something that admitted of doubt" [*Cicero, Topic. ad Trebat.]. Now, that something in relation to human acts admits of no doubt, arises from a twofold source. First, because certain determinate ends are gained by certain determinate means: as happens in the arts which are governed by certain fixed rules of action; thus a writer does not take counsel how to form his letters, for this is determined by art. Secondly, from the fact that it little matters whether it is done this or that way; this occurs in minute matters, which help or hinder but little with regard to the end aimed at; and reason looks upon small things as mere nothings. Consequently there are two things of which we do not take counsel, although they conduce to the end, as the Philosopher says (Ethic. iii, 3): namely, minute things, and those which have a fixed way of being done, as in works produced by art, with the exception of those arts that admit of conjecture such as medicine, commerce, and the like, as Gregory of Nyssa says [*Nemesius, De Nat. Hom. xxiv.].