Space. Time. A difference between these two words is obvious, the letters are different, only the 'e' is the same. If I put a dash '-' between the words Space and Time something else happens. Space-Time. Instead of being different, Space and Time coalesce.
This thought about 'difference', touches on feelings about being, being the same, being different. Two entities seemingly existing in different realms, these are realms of thought and feelings that swirl around some things that seem to be thoughts.