Bertrand Russell quote needed

Greetings.

I’ve just spent the better part of an hour scouring the web and various quotation sites for a particular quote which I’m almost positive is by Bertrand Russell. Paraphrased, it is as follows:

“I’m tired of you religious people attacking me for being inconsistent in my ideas. Unlike you, I don’t consider every statement I make to be eternal and unchangeable truth, but rather that any opinion I have ever held has seemed to me to be the best at the time, given the available information.”

Can anyone give me the real quotation, and also the original source?

Don’t know it. But I prefer John Maynard Keynes’ similar comment in response to an accusation of inconsistency (he was more “economical” with words)…

“When the facts change, I change my mind. What do you do, sir?”