Is there a reason behind the "Spirit of _____" team names, liveries, etc?

Spirit of Daytona Racing 1976 Spirit of Sebring & Spirit of Le Mans Corvettes Spirit of Race Spirit of America livery on the Panoz LMP1 Roadster The ACO's "Spirit of Le Mans" trophy

Is there a reason this is common in sports car racing specifically? I'm sure some of them are probably coincidences, but I've never noticed this in any other racing disciplines & at least of the surface it seems like none of the examples have any relation with each other.