I've listened and read Matthew Walker, a sleep scientist, and I've come to the conclusion that sleep is, by far, the best tool for personal development, going meta, having healthy relationships, consciousness work and living happily. It is just mind-blowing. The education system is criminal for forcing teenagers to go against their biology (read the book for understanding this statement better). I've always hated when my mother used to wake me up at 6:30 in the morning to go to school, after going to bed at 00:00 as any other teen governed by their biological transformations, which includes a shift in your circadian rythm at that age, would. Now I understand why I struggled the way I did back then, and this still is to this day something that I cannot come to terms with. I don't blame my mother I blame the system, in fact my mom usually allowed me to stay in bed which was the best thing that could happend to me in that moment, and everyone around me of course used to call me "lazy". Such a shame. If you research the matter enough you will view sleep in a more mature way, taking advantage of it and not neglecting it anymore. I make this post because I intent to share this knowledge with as many people as soon as possible, since we as a collective neglect sleep on a daily basis, and even sometimes we feel proud about it. I am changing forever the way I relate to sleep after reading this book. All the credits to Matthew Walker. This book covers, among other things: How sleep regulates the inmune system. How sleep is essential for memory formation, and how a sleep deprived brain will boicot any learning attempt. What is sleep? Why sleep exists among all living creatures? Does a cell sleeps? And most important, why should you sleep? sleep stages, body systems of sleep such as melatonin production, light exposure, circadian rythm, etc. Other things that you should learn ASAP. "Why We Sleep" on Amazon. Why We Sleep Free Audiobook on YouTube.  Note: just a few first chapters, not the full audiobook. Extracts from the book to convince you even further: I am thinking of making a video exposing in great detail everything about sleep and why we should care. That would be a great service to mankind.