Anatta

Impermanence, called Anicca in Pāli and anitya in Sanskrit, appears extensively in the Pali Canon as one of the essential doctrines of Buddhism. The doctrine asserts that all of conditioned existence, without exception, is "transient, evanescent, inconstant". Anicca is one of the three marks of existence—the other two are Duḥkha (suffering or dissatisfaction) and Anattā (the lack of a lasting essence). Anicca is in contrast to Nibbana, the reality that is nicca, or knows no change, decay or death.