Answer:
Anitya is one of the three marks of life, the others being dukha ("suffering") and anatman (not-self) ("impermanence"). The “right knowledge” is the recognition of pain as one of three universal characteristics of life, along with impermanence (anichcha) and the lack of a self (anatta). There are three kinds of suffering: discomfort from old age, illness, and death; happiness turning to pain; and the fact that humans are vulnerable to misery in the next moment due to impermanence.
Explanation:
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