Can you tell?

"So, so you think you can tell
heaven from hell,
blue skys from pain?
Can you tell a green field
from a cold steel rail?
A smile from a veil?
Do you think you can tell?


And did they get you to trade
your heros for ghosts?
Hot ashes for trees?
Hot air for a cool breeze?
Cold comfort for change?
And did you exchange
a walk on part in the war
for a lead role in a cage?"

Pink Floyd, Wish you were here