I believe that time is only a perception. When you think about it memories on top of memories creates the illusion of time in our brains. Time seems to be a cause and effect compared to other causes and effects. I believe that time is a perception because without a human mind everything just happens. When people go to sleep and it feels like a second its because they are not precieving time as they do while awake. So without perception time doesn't exist and is only cause and effect.