wish you were here

Pink Floyd, Wish You Were Here (1975) 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?

Did they get you to trade your heroes for ghosts?
Hot ashes for trees?
Hot air for a cool breeze?
Cold comfort for change?
Did you exchange
A walk-on part in the war for a lead role in a cage?