Lyric discussion by Vozzy 

To Killingfloor:

Imagine a comma (,) in the title, like this, "Shine On, You Crazy Diamond." You'll see that the You Crazy Diamond is one construction, the subject of the phrase, as in: "You (Crazy Diamond) Shine On," Or "(You Crazy Diamond) Shine On." Consider the title a command sentence, where the "you" is implied.

"You Crazy Diamond" is a similar construction grammatically to "We Three Kings" or "We the People" or "Bob the Builder". These are all one "subject" or noun-phrase.

Hoping this helps, vozzy

@Vozzy I think an easier way to explain would be like you said first, "Shine On, You Crazy Diamond," or it could be, "Shine On You, Crazy Diamond." One means to keep shining, and one means that someone, or something, is shining on "You:" the Crazy Diamond.

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