I hate theorizing like this sometimes cuz I often contradict myself, and argue with myself, and think of new ideas constantly, but it is a great way to exercise the mind.

Another hard concept to visualize is time. Who one day decided that the year we are now in is 1? What if there was previous generations of people who had a time system of their own, contradicting the man who invented the year. It is infinite, and a hard concept to grasp. It seems so basic, but I could think about this for hours.