What is Time
Einstein's theory of relativity holds that the faster an object moves, the slower time passes. This means that a spacecraft traveling close to the speed of light for five years, according to those on board, will return to an earth that has aged 36 years. Indeed, a photon traveling from a distant star to earth gets here in billions of years according to us, but according to the photon the elapsed time would be much, much less. This aspect of Einstein's theory has been experimentally confirmed many times, and it has practical applications when it comes to satellites and space travel. It is called "time dilation." I point this out to show that time is not an absolute. It depends on the frame of reference of the perceiver. Not surprisingly, various cultures have conceptualized time in radically different ways. Ancient Jewish and Christian cultures saw time as a falling away from a paradisiacal past—namely, the Garden of Eden. Time has alienated us from a direct experienc...