I recent came across this paragraph by David Hume. Although he is considered a philosopher, he tried to make comments on math as well. I find this one interesting, but I have no idea what it means and what he is getting at. Out of pure curiosity, does anyone else know what this means?: "The angle of contact between a circle and its tangent is infinitely less than any rectilinear angle, so that as you may increase the diameter of the circle to infinity, this angle of contact becomes still less, even in infinity, and that the angle of contact between other curves and their tangents may be infinitely less than those between any circle and its tangent, and so on, infinity".