A little comma

Do not  enter God knows you’re a bore!

That sentence can have different meanings depending on whether you put  commas in it and also where you put them.In speech we can tell from the sound of the voice.
In writing we can’t    hear that.So we need guidance.

2 commas below:

Do not  enter, God knows, you’re a bore!

1 comma

Do not  enter, God knows you’re a bore!

I imagine you may think  of  other meanings as well.