The Fifth One Is to Accept Constant Change

As soon as the teacup's full, there's no more room for more tea, so we keep it empty. To me, this means it's an invitation to be open to whatever arises in every moment. The fifth one is to accept constant change. We all get stuck from time to time when that piece shows up. Ri ah, i almost had this figured out, and then that showed up. Why did that have to show up?