Delusions are false beliefs that are firmly held. Types of delusions include:
- Delusions of grandeur - the false belief that one is famous or publicly important or is a god, etc.
- Delusional jealousy - believing a spouse or partner is unfaithful when it is not true.
- Persecutory or paranoid delusions - believing one is being followed, spied upon, secretly listened to, etc. - see Paranoia.
- Delusions of reference - thinking that random events contain a special meaning for you alone.
- Other "bizarre" delusions - things that are impossible, such as believing one is a werewolf, that one's spouse is an octopus, or that giant worms make subway tunnels.