They Might Be Giants - Birdhouse in your Soul

I just love this track. I have a great affection for They Mught be Giants. This song is one of the most infuriating to understand. Let's put it this way - if you want to know what it's all about there is no clear answer - here is my understanding. It is about your conscience. Read the lyrics below and think about what I said. Who is your only friend, your little glowing friend who really isn't?

Lyrics:

I'm your only friend
I'm not your only friend
But I'm a little glowing friend
But really I'm not actually your friend
But I am

Blue canary in the outlet by the light switch
Who watches over you
Make a little birdhouse in your soul
Not to put too fine a point on it
Say I'm the only bee in your bonnet
Make a little birdhouse in your soul

I have a secret to tell
From my electrical well
It's a simple message and I'm leaving out the whistles and bells
So the room must listen to me
Filibuster vigilantly
My name is blue canary one note* spelled l-i-t-e
My story's infinite
Like the Longines Symphonette it doesn't rest

Blue canary in the outlet by the light switch
Who watches over you
Make a little birdhouse in your soul
Not to put too fine a point on it
Say I'm the only bee in your bonnet
Make a little birdhouse in your soul

I'm your only friend
I'm not your only friend
But I'm a little glowing friend
But really I'm not actually your friend
But I am

There's a picture opposite me
Of my primitive ancestry
Which stood on rocky shores and kept the beaches shipwreck free
Though I respect that a lot
I'd be fired if that were my job
After killing Jason off and countless screaming Argonauts
Bluebird of friendliness
Like guardian angels its always near