« Les chats furent créés dans notre monde pour réfuter le dogme que toutes choses furent créées pour servir l’Homme. » — Froquevielle
• “Cats were created in our world to refute the dogma that everything was created to serve mankind.”
Post-Performative Post-Scriptum
I can’t find any more details of “Froquevielle”, which may be a misspelling.
Overlord In Terms of Core Issues Around Maximal Engagement with Key Notions of the Über-Feral 
There’s a nearly identical quote (“Cats were put into the world to disprove the dogma that all things were created to serve man”) attributed both to Hemingway and someone called Paul Gray (likely not the Slipknot bass player, as Google seems to think).
Thanks. I didn’t think it might be a translation from English, tho’ it seems obvious now you suggest it. The French may be a bit odd.