If you notice one is moving a lot, and the other..not so much. The one on the right is facing outside. The on the left is facing the kitchen. The one facing the window is dancing it's little heart out even though to MY eyes, there is clearly no sun to be seen today. Ah hah...see where I'm going with this?!
I think of us with chronic pain and how we cannot see the sun some days. We cannot feel the sun some days. It's covered by clouds, snow, or rain is blocking it out.. It's dark and cold, outside and in our heart. It's painful and exhausting in our bones and in our daily life, and therefor we are tempted to stop moving. Stop "dancing".
Even when we can' see it, we have to have hope that things can get better and "Keep Moving Forward."