Wish you were here

So,
So you think you can tell
Heaven from Hell,
Blue skies from pain
Can you tell a green field
From a cold steel rail?
A smile from a veil?
Do you think you can tell?

How I wish, how I wish you were here
We're just two lost souls
Swimming in a fish bowl,
Year after year,
Running over the same old ground.
What have we found?
The same old fears
Wish you were here