It is more than current and voltage. It is the backdrop as your family gathers around the kitchen island to help prepare a nourishing meal. It is the safety and peace of mind during a dark, lonely evening. It is the warmth filling the room during those cold, snowy storms. It is the relaxing feeling of steaming bubbles as you gaze at the stars. It is the connection between you and your distant family and friends. It is the single most important discovery in the history of humankind. The pathway from dark to light.