Each of us has a schedule either set by others or set by us. We may think everything is running smoothly, and there are no bumps in the road.
Having walked a couple country miles in my life, I have learned what you know also, the road can get extremely cold and even whiteouts of blowing snow, and other times there comes the unbearable heat and humidity of that dusty road as people drive by.
In this walk Home, we may say we aren't available because we have places to go. Yet something completely different and wonderful occurs when we become available.