"Some of the most agreeable proportions [to humans] have an identifiable mathematical basis and are frequently found in natural forms.  [...]  If a group of people are asked individually to put a mark on a line that produces a pleasing division, the majority will intuitively select a point that roughly produces [what has come to be called] a Golden Section, [... a ratio of] approximately 8 to 5."—from Keith Micklewright in Drawing: Mastering the Language of Visual Expression, Harry N. Abrams, Inc., Publishers, 2005, p.58