what is the difference between a reverend and a canon

what is the difference between a reverend and a canon 

“A canon on a cathedral staff assists the dean, and a canon on a diocesan staff assists the bishop. Deans and provosts are styled the Very Reverend, while canons and prebendaries (but not minor canons) are styled the Reverend Canon or Prebendary”

 

what is the difference between a reverend and a canon

 

“The body of high culture literature, music, philosophy, and works of art that is highly valued in the West”