"We regale each other with stories of great saints who got up at four or five o'clock in the morning to pray, forgetting that in the days before electricity most people went to bed soon after dark and woke up earlier in the morning. Most of our heroes from bygone ages probably slept much more than we do. Very few of us can survive, let alone thrive, on four or five hours a night.
By all accounts, we are sleeping less than ever before. The average American gets two and a half fewer hours of sleep per night than a century ago. According to the Center for Disease Control and Prevention, more than 40 million Americans get fewer than six hours of sleep per night." - Crazy Busy, DeYoung, p95