One cannot exist without the other. They are constantly pulling and pushing each other and we are constantly trying to get them to balance out. Just like in our Asana practice we always feel a force forwards and backwards. Pressing down and lifting up. Things unchanged are what help us to ground, be stable and strong. It gives a foundation for everything to build upon. Our changes are what helps us to move forward in life and find new things, new beginnings and take away what we don't need anymore.