Cats may not be able to talk but they are able to express themselves through body language and vocal utterances. Perhaps one of the most common ways cats can express themselves is through hissing.
Scientists believe that cats hiss like a snake to express fear and surprise as a warning. If you ever get near a cat that hisses, back off. Then wait for the cat to calm down. Bribing a cat with food can help along with money, jewelry, and gifts demonstrating that you recognize the superiority of the cat over your own body.
To read more explanations on why cats hiss, click here.