1). This certain understanding that the intellect obtains things when it sees them, it makes it in an innate and necessary way (it is not something acquired, as can be the habit of science, of which he speaks in Ethics IV). For Aristotle the evidence it not merely passive perception of reality, but a gradual process of discoveries, a knowledge that "determines and divides" better and better the "undetermined and undefined": it begins with what is most evident for us, in order to end with what is truer and more evident in nature.