It sometimes feels like our minds are not on the same team as us. I want to go to sleep, but it wants to keep me awake rerunning events from my childhood. I want to forget the lyrics from that stupid 80s pop song but it wants to repeat them over and over again ad nauseam.
This internal battle can be anything from the attempt to suppress an occasional minor irritation (did I turn off the cooker?) to a near-constant obstacle to everyday life. Perpetual thoughts of food drive people to obesity, persistent negative thoughts cue depression and traumatic events push back into consciousness to be relived over and over again.