Ayoub

“Protect the environment? Prevent animals from extinction? Bullshit! Why don't you just admit it! Humans shouldn't always be exploiting other creatures and thinking only about themselves! How can you 'rule over the world' like that? You think you treat us fairly? I see no justice! You call us parasittes... But we are responsible for balancing nature. You humans are the real parasites of nature! You are the monsters!
- Mayor Hirokawa”
― Hitoshi Iwaaki, Parasyte, Volume 9

“You guys win this time! After all, no other creature on Earth is better at "Killing" than you humans! But your weapons... should be used for a better mission! That mission is... to maintain the balance of this world! Soon you'll discover that littering is a worse crime than murder! Eventually you humans will understand our importance and protect us! You will treat your "enemies" as if they are the most important things that you have! And then your "enemies" will restore the beautiful nature to its proper order! and the world will be at balance again!
- Mayor Hirokawa”
― Hitoshi Iwaaki, Parasyte, Volume 9

“There is no such thing as compassion or love. All behavior that appears to stem from love is, in fact, merely behavior to better the transmission of an individual's DNA.

From a pig's perspective, humans are merely monsters who feed upon them. See, it is the human species who are making grandiose statements like, "All life on Earth must coexist.”
― Hitoshi Iwaaki, Parasyte 1

“Tamura Reiko - I didn't want to go this far, but don't you guys coexist with other animals? Even if you humans have a higher status from a pig's point of view, aren't you just monsters who eat pigs?”
― Hitoshi Iwaaki, Parasyte, Volume 6