"Religion is regarded by the common people as true, by the wise as false, and by the rulers as useful."
I think it’s a misquote attributed to Seneca which you haven’t attributed to anyone!
I prefer the original version
All religions are equally sublime to the ignorant, useful to the politician, and ridiculous to the philosopher.
Titus Lucretius Carus (c. 99 BC – 55 BC)