What is inner impermanence? The term “inner” denotes sentient beings. The sentient beings referred to here are not plant life but living beings that can experience suffering and happiness.

Inner impermanence can also be classified as continuous or momentary.

Continuous impermanence is easy to understand, like when we undergo successive rebirths as a human or god in the previous life, as a human in this life, and as a human or animal in the next life; or when we experience the various changes within this lifetime, i.e., birth, infancy, childhood, youth, manhood, aging, and death. These changes which we can clearly observe not only in ourselves but also in other beings constitute continuous impermanence.

Momentary impermanence denotes the arising and ceasing that take place each instant in our body and mind as in the world outside.

- Quote from The Four Seals of Dhama, "All Phenomena Lack Self-Existence"