When powerful Romans, such as duces [military leaders[, needed to be transported, they would hire an auriga, a slave with gladiator status whose job it was to drive a biga [a light vehicle driven by two horses].
As a personal “chauffeur,” an auriga was handpicked from the most reliable slaves.
It has also been suggested that this name was given to the slave who, during Roman Triumphs, held a laurel crown over the head of the dux while standing at his back and continuously whispering “Memento Mori” [“remember you are mortal”] in his ears.
This was done to prevent the celebrated commander from losing his sense of balance in the excesses of the celebrations.
At your peak, you need to be reminded that you’re mortal.
I think every successful person needs their own auriga, someone who keeps them grounded.