multiplicity and complexity

complexity_ball“The human mind cannot grasp the causes of phenomena in the aggregate. But the need to find these causes is inherent in man’s soul. And the human intellect, without investigating the multiplicity and complexity of the conditions of phenomena, any one of which taken separately may seem to be the cause, snatches at the first, the most intelligible approximation to a cause, and says: ‘This is the cause!’ ”
— Leo Tolstoy, War and Peace, Book IV, Part 2, Chapter 1, first paragraph