Horizons

I like the concept of Horizons: they are where the human eye can no longer perceive detail and so the mind blends it all together--but they are as far as the eye can see.
They are also where sky and ground meet in a distinct line. 
There is a lot of distance between here and there--many obstructions and obstacles.
...but there really isn't an end. The earth is circular, so the real "end" is behind you.
There isn't one single horizon for everyone, everyone is in a different position and everyone faces different obstacles in reaching the horizon--some have steep mountains and some have smooth green plains.

Whatever you think is the end is not the end.
The world is bigger than what you see in the distance.
We're all traveling towards our horizons.