Most people can live about 40 days without food; they can live about 4 days without water, but they can't live more than about 4 minutes without oxygen.
As you read these words, your chest is softly, rhythmically, and automatically rising and falling as air enters into and exits your lungs. You probably weren't even consciously aware of this until I called it to your attention. Yet, without this intake of air, which contains oxygen, your physical life would come to an abrupt end. The Bible says: