Vipassana (Pali) or vipasyana (; guan; , lhaktong; Wyl. lhag mthong) in the Buddhist tradition means insight into the true nature of reality, namely as the Three marks of existence: impermanence, suffering or unsatisfactoriness, and the realisation of non-self. Presectarian Buddhism emphasized the practice of Dhyana, but early in the history of Buddhism Vipassana gained a prominent place in the teachings.