here on the value of light. Light is as indispensable to life as air itself. Hence it is that Hell is represented as completely dark. Where light cannot penetrate, the air can never be pure. If we enter a dark cellar, we can distinctly perceive the smell of the foul air. The fact that we cannot see in the dark shows that God has intended us to live and move in the light. And Nature has given us just as much darkness as we require in the night. Yet, many people are in the habit of sitting or sleeping in underground cellars, devoid of air and light, even in the hottest summer! Those who thus deprive themselves of air and light are always weak and haggard.
Now-a-days, there are many doctors in Europe who cure their patients by means of air-bath and sun-bath alone. Thousands of diseased persons have been cured by mere exposure to the air and to the sun-light. We should keep all doors and windows in our houses always open, in order to allow the free entrance of air and light.
Some readers may ask why, if air and light are so indispensable, those who live and work in cellars are not visibly affected. Those who have thought well over the matter would never put this question. Our aim should be to attain the maximum of health by all legitimate means; we should not be content merely to live anyhow. It has been