Much of our daily life is make-believe. To be with the real we have to withdraw from this charade and embrace our actual experience, including the perception of impermanence.
The only thing that we can know for sure is the constancy of chance. It's the most basic fact of our existence. Realization of the truth of impermanence is a gateway out of feeling the separateness - the suffering of self-centered existence. We begin to understand that we are intimately woven into endlessly changing, reflective web of life.