James Bryan Smith writes, "The number one enemy of spiritual formation today is exhaustion. We are living beyond our means ... physically. And as a result, one of the primary activities of human life is being neglected: sleep."

In the 1850's, the average American slept 9.5 hours. By 1950, that had dropped to 8 hours and today the average American gets only 7 hours of sleep a night.

James Bryan Smith continues, "Neglecting our bodies ... impedes our spiritual growth ... If our bodies are not sufficiently rested, our energies will be diminished and our ability to pray, read the Bible, enter solitude or memorize Scripture will be diminished."