Heinlein quote: I know it's none of my business...

I know it’s none of my business…

Something about putting a period after “business” and not using too much force supplying the period. “Shooting them will only give you momentary satisfaction and is bound to get you talked about” might be the rest of it.

Can someone supply the entire quote and the reference? (I know you can.)

Thanks!

“The correct way to punctuate a sentence that starts: “Of course it’s none of my business, but…” is to place a period after the word “but”. Don’t use excessive force in supplying such a moron with a period. Cutting his throat is only a momentary pleasure and is bound to get you talked about”
from The Notebooks of Lazarus Long.

I knew it wouldn’t take long. I was searching for “shooting them,” hence my google-foo was weak.

You know, that Lazarus Long fellow sure was something.
Or will be something.
Or is something.
Yes, ‘is’ is the proper word here.