[146] [cap.26] And yet even this is not unknown to any one, namely, that philosophy has bestowed upon all the particular sciences their first principles and seeds, from which speculations respecting them appear to arise. For it is geometry which invented equilateral and scalene triangles, and circles, and polygons, and all kinds of other figures. But it was no longer geometry that discovered the nature of a point, and a line, and a superficies, and a solid, which are the roots and foundations of the aforementioned figures.