“There is no animal which is always awake or always asleep.” ... Aristotle (384 BC - 322 BC), is one of most important philosophers of all time and remain a fountain of inspiration for modern thinkers. His works included logic, physics, politics, metaphysics, rhetoric and zoology, biology, poetic tragedy and ethics that are still relevant today. He also preferred to define things in more concrete and scientific manners and seemed to always have had explanations for everything around him. He also tried to reason things based on direct observations and cataloging of phenomenon. Aristotle’s text On Sleep and Sleeplessness attempts to explain why we sleep and wake. He believes that sleep and wake are both affections of the activity of the primary faculty of sense-perception. That sleep is also a state of powerlessness arising from excess of waking.