One country made up of one people,
a family with one history,
one language,
one culture,
one blood,
divided into Us
and Them.
Whether you were Us or Them depended on which side you happened to be on when they drew the line.
An arbitrary line defines, divides, denies. It is man-made, maintained by ideologies, ideas, invisible things. The line is invisible, meaningless. And yet it means everything.
If you want it to.