It is no exaggeration to say that yoga culture and practice as we see know it today would be completely unrecognizable to the original practitioners, or Yogis, of times past. Some might attribute this to the superficiality of modern yogis or the need to dilute the essence of yoga principles to make them more palatable to a technologically-advanced civilization, but this is not the case, at least not entirely. Neither of those perspectives considers the very nature of yoga and its foundations. Not only have the original ideas and concepts proffered by the swamis of ages past been adapted and altered much through the generations, the very words, and terms used to describe the practice of yoga have a decidedly malleable nature and offer great flexibility. Many of the terms and concepts are seen in Yoga are the product of other traditions and practices covering an extensive history and innumerable developments. It could be said that flexibility is the very nature of yoga because nature favors the flexible.