In the Buddha’s teachings on transience, his point is that everything is always changing. When we take loved objects into our egos with the hope or expectation of having them forever, we are deluding ourselves and postponing an inevitable grief.
Epstein identifies transience as the Buddhist foundation for understanding attachment and grief, arguing that the refusal to accept impermanence constitutes a psychological delusion that defers inevitable suffering.
, Going to Pieces Without Falling Apart: A Buddhist Perspective on Wholeness, 1998thesis