A mentor is a trusted guide. Mentor was Odysseus' friend, and Athena borrowed his face to advise his son.
In the Odyssey, Odysseus leaves his son in the care of his old friend Mentor. The goddess Athena disguises herself as Mentor to guide the boy. The name became the word.
The coach who taught you to throw a spiral and also to shake hands like you mean it.
The best managers are mentors in the oldest sense: guides through someone else's odyssey.
Practice it in Skepsis