Please note that the content of this book mainly consists of articles that are available online from Wikipedia or other free sources. Vipassan (Pali insight) refers in Buddhism to the insight into the three characteristics of existence: impermanence (anicca), suffering or dissatisfaction (dukkha), and non-self (anatta). The practice path to develop this insight is called Vipassana meditation (vipassan bhāvanā), insight meditation, or Vipassana practice. Vipassana practice is a way to overcome the suffering (dukkha) caused by ignorance (avijjā) and delusion (kilesa) or to attain the liberation of Nirvana in life. It is traced back to a commentary (Visuddhimagga) on the discourses of the historical Buddha preserved in the Pali Canon.