When she sees the leaves fall, they raise no other idea in her mind than that winter is approaching.
Johann Wolfgang von GoetheWhen the boy begins to understand that the visible point is preceded by an invisible point, that the shortest distance between two points is conceived as a straight line before it is ever drawn with pencil and paper...the fountain of all thought has been opened to him...the philosopher can reveal him nothing new, as a geometrician he has discovered the basis of all thought.
Johann Wolfgang von Goethe