 Just as some things that are cognizable are very clearly evident, such as axioms and first principles, while some are less evident, such as particular conclusions, so also in things that can be done, some are evident in the highest degree, for example, “Do not do to another what you do not want done to you” and that one should submit to God and suchlike. In the same way, then, as the cognition of first principles is said to be innate in us by reason of that light, because (due to their self-evidence) that light suffices for cognizing them (after the reception of species) without any additional persuasion, so also the cognition of moral first principles is innate in us, in that that judicatory suffices for cognizing them. Again, in the same way as cognition of the particular conclusions of the sciences is acquired, because the light innate in us does not fully suffice for knowing them, but some persuasion and fuller acquaintance are needed, so on the side of things that can be done we must understand, similarly, that we are bound to do some things which we know only through additional instruction. (commentary on the Sentences 2.39: a. 1, q. 2; McGrade trans 2001: 179)