Sapkowski said this quote

You thought? The landsknecht glanced at him piteously. With what, I wonder? If you swallowed a cockroach with your soap, dolt, you'd have more intelligence in your guts than in your head.

~ Sapkowski

So you've got the honest truth and faithful history of a world where he who shatters the skulls of others most efficiently and swells women's bellies fastest, reigns. And it's just as hard to compete with you people in murdering as it is in screwing...

~ Sapkowski