The teams are so closely matched that on any given Sunday, any one team can beat any other team. Professional football has come down to the point where the psychological edge is the determining factor. Physically these teams are even, so it depends on the mental outlook of the squads to determine the winner. It's this factor that has made the game close and is bringing fans out to the ball parks.
— Bert Bell, then-NFL commissioner, in 1952
The NFL is such a large, multibillion dollar enterprise with fan loyalty because they have provided not only entertainment for sports fans, but memories, good memories, family memories to these fans, that can only bring about good will.
