SAD

In mental-health, the above is an acronym for the term, 'Seasonal Affective Disorder'. Also known as 'winter depression', it is a mood disorder that affects people during the winter and early-spring seasons, year after year.

One of its primary treatments include light therapy. Light, as we know it, in relation to our health is responsible for producing Vitamin D. Along with its properties in maintaining bone health in the absorption of calcium and phosphorus and its role in helping with the immune system, it also has beneficial effects upon one's cognitive functioning.

Whatever it is that happens, I think God has a clever way of revealing to us, through this parable of man's physical dependence upon light, of our even bigger spiritual need for him, The Light.