What is mind playin tricks on me sample?

"Mind Playin Tricks on Me" is a song by the southern hip-hop group, Geto Boys. The song was released as a single in 1991 and appeared on their album "We Can't Be Stopped". The sample used in the song's instrumental is from Isaac Hayes' 1973 album "Joy". The song's lyrics describe paranoid thoughts and experiences of the rappers, referencing mental illnesses such as schizophrenia. The song has been praised for its dark and introspective message and for its impact on the southern rap scene in the early 1990s. It has also been influential in the horrorcore subgenre of hip-hop.