When we are alone, the worst and saddest things come to mind. We reflect in detail upon all sorts of evils. And if we have encountered adversity in our lives, we dwell upon it as much as possible, magnify it, think that no one is so unhappy as we are, and imagine the worst possible consequences.
The bent over women in Luke had what some call limited horizons. She could only see the ground. That inability to look around and up is a picture of sin sickness. The cast down soul of Psalm 42 is ubiquitous. Nothing is right and there is no joy. Some call it depression. When Jesus frees her she stands up straight and praises God. Lifting up heads and rejoicing should be the posture of the faithful.