Lyric discussion by TheFranzFerdinand 

Cover art for Jugband Blues lyrics by Pink Floyd

I don't think Syd Barrett was insane, and I don't think he thought he was either. He had grown tired of everything and was acting strange simply because he felt trapped. This song addresses how people are treating him

It's awfully considerate of you to think of me here And I'm much obliged to you for making it clear That I'm not here.

This almost seems like he's sick of people telling him he's mad or treating him like he is, or simply diagnosing his problems(as Dave and Roger were known to do later publically, perhaps they did so privately then).

And I never knew the moon could be so big And I never knew the room could be so blue And I'm grateful that you threw away my old shoes And brought me here instead dressed in red And I'm wondering who could be writing this song.

I don't really know this part except the end, I'm wondering who could be writing this song, if he were mad, how could write a song?

I don't care if the sun don't shine And I don't care if nothing is mine And I don't care if I'm nervous with you I'll do my loving in the winter.

He doesn't care what people think about him, he's going to do his own thing, regardless.

And the sea isn't green And I love the queen And what exactly is a dream And what exactly is a joke.

Just questioning what normal is basically, what is a dream, and what is a joke? If you think about it, they're both very deep questions. I do not think Roger "Syd" Barrett was insane, I think he knew full well what was going on and was just striving to be different.