Guess again.
I borrowed his book A Different Universe from a library about a year ago (in fact, I needed an inter-library loan). I posted the quote on my website months after I had returned the book, and I can’t remember specifically where I got it from, but I know he said something like that in the book. If you have the book handy, why don’t you tell us exactly what he wrote. Just look up “evolution” in the index.