Season 7, Episode 19: "The Wig Master"

Well, then you really have something to think about

because, you know, if there's any doubt in your mind...

And it doesn't even have to be a big doubt, you know,

even a... A tiny doubt, a dot of a doubt...

There's no doubt.

Because if there's any doubt at all,

I feel that we should cultivate it.

Yes, you know, deal with it.