 For example, when I simply have the initial simple concept of circle abstracted from circular objects I have seen, that concept is good enough for me to tell circular objects apart from non-circular ones. But with this simple, unanalyzed concept in mind, I may still not be able to say what a true circle is supposed to be, and accordingly, exactly how and to what extent the more or less circular objects I see fail or meet this standard. However, when I come to understand that a circle is a locus of points equidistant from a given point, I will realize by means of a clear and distinct concept what it was that I originally conceived in a vague and confused manner in my original concept of  circle.[23]