Sleep is not a luxury. It is not a reward for finishing your to-do list. It is one of the most powerful biological tools we have for healing, regulating, restoring and protecting our bodies and minds. From infancy to older age, sleep underpins everything — our mood, metabolism, memory, immune system, heart health and hormonal balance. Yet in modern life, it is often the first thing we sacrifice. Let’s explore why sleep matters so deeply, what causes sleep deprivation, and how