Brian Wilson and his brothers, Carl, and Dennis grew up with an oppressive father. According to Brian he is deaf in one ear because of his father slapping him upside the head. He says that retreating to his room where he had his piano was his great escape. So this song is really autobiographical. "Do my dreaming and my scheming, lie awake and pray."
Lyrics
There's a world where
I can go and
tell my secrets to
In my room
In my room
In this world I
Lock out all my
Worries and my fears
In my room
In my room
Do my dreaming
And my scheming
Lie awake and pray
Do My crying
And my sighing
Laugh at yesterday
Now it's dark
And I'm alone but
I won't be afraid
In my room
In my room…