Ace of Wands - Emperor
foremost authority
foremost - Ace of Wands
authority - Emperor
Ace of Wands is a club raised right in your face, so it is about assertion or aggression. It is about being Number One, being the foremost thing or person.
Emperor is the head man, so he is the head of anything, including the family, so Emperor has the authority.
(Actually, both these cards express the concept of authority, with Emperor just meaning that position or title, and Ace of Wands indicating the author...