Mind like a door

Sometimes my mind's just like a door
it's open night and day always open to suggestion
Don't want to throw a good idea away
Sometimes my mind's just like a door it's closed
So no one can get in
Too afraid to leave it open afraid a stranger might come in
Sometimes my mind's just like a door
It's made out of the thickest wood
And you may try your best to kick it down
But that won't do you any good
Sometimes my mind's just like a door
and I lose the key, I find myself locked outside
Trying to break back in so desperately