wish you were here歌词是什么意思

Nobody knows where you are, how near or how far.
Shine on you crazy diamond.
Pile on many more layers and I'll be joining you there.
Shine on you craz...

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 thin...

Lock on my heart and it's missing the key
It's got your name on it, it's got your name on it
Shadows on walls like you're talking to me
It's got your ...

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...