As well as the use of the principle of simplicity, His Majesty employs natural principles to deal with problems or to improve unfavourable conditions; for instance, the use of clean water to get rid of or to dilute polluted water according to the ebb and flow of the natural tides. Water hyacinths that grow naturally in waterways are used to absorb polluted substances in water, illustrating His Majesty’s notion of “Using Vice to Defeat Vice.”