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?

And did they get you to trade

Your heroes for ghosts?

Hot ashes for trees?

Hot air for a cool breeze?

Cold confort for change?

And did you exchange

A walk on part in the war 

For a lead role in a cage?