Time can move fast or slow depending on how you perceive it. Each day is comprised of just 24 hours. For some, these 24 hours go by like a flash in the pan. For others, they expand as far as the eye can see like a terrible desert.

Albert Einstein's Theory of Relativity says the rate at which time passes depends on the observer's frame of reference. Einstein was once asked to explain relativity in layman's terms. He said that if you put your hand on a hot stove for a minute, it seems like an hour. However, if you sit with a pretty girl for an hour, it seems like a minute. Pain moves slower. Pleasure moves faster.

In between these two extremes is another measurement of time called flow. Flow happens when you are totally immersed in a task in front of you. In a flow state, time doesn't move fast or slow. It moves both fast and slow. Time becomes difficult to register. Slippery, almost. When we are in flow, hours can feel like minutes and days. Time becomes a blissful eternity.