According to one of the central dialectical tenets of DBT, change is the nature of life. Everything is in a constant state of change.
I can accept the idea of constant change and see it in the world all around me. Seasons change, children grow, friendships strengthen or grow more distant. We move, get older, experience health problems, fall in love, recover from sickness, lose loved ones, graduate from school and so on. But sometimes those things we most wish to change, seem to stay the same.