One can only perceive as far as the senses allow. Although we have expanded the range of our senses with instruments such as microscopes and telescopes, we still feel that something is hidden from us. Whether it is science that brings us to this conclusion or whether it is just one’s own life; we (for the most part) feel that there is something more that is hidden, and whatever it is, its appeal is growing in our time.
Courtesy of http://www.youtube.com/watch?v=TpsDsS3KFN8