If you encourage totalitarian methods,

...the time may come when they will be used against you instead of for you

- George Orwell

Not actually a quote from Animal Farm.  It was from an unpublished introduction to Animal Farm written by Orwell
https://www.orwellfoundation.com/the-orwell-foundation/orwell/essays-and-other-works/the-freedom-of-the-press/
https://www.nytimes.com/1972/10/08/archives/the-freedom-of-the-press-orwell.html