Indeed, the water I give him will become a spring of water welling up to eternal life. Whoever believes in me, as the scripture has said, streams of living water will flow from within him. Water is a very apt illustration for our spiritual needs because water is so important to our physical bodies. For many years, water in the body was considered an inert substance. However, research has shown that is not the case.
Water intake is essential to the body.
Every system in the body requires water to function adequately. The recommended amount of water intake a day is 8 oz for every 20 lbs of body weight. The majority of Americans are suffering from symptoms of dehydration. In the same way that your physical body functions better with adequate water, so your spiritual body functions better when you're filled with the water of life. We make things too complicated sometimes.