My goal in what follows is to argue that Astell endorses what I call the admonisher conception of a friend. For I will argue that, according to Astell, a sufficient condition for whether someone is our friend is that they admonish us in her technical sense. So anyone who admonishes us in this sense-be they Mother Teresa, the sinner sitting in confession, or our professional rival-is a friend to us. Put simply, an Astellian friend is an admonisher. The paper is divided into four sections. Having motivated my reading in section one, section two develops and defends my thesis that admonishment is a sufficient condition for someone to be our Astellian friend. With Astell's admonisher conception on the table, the balance of the paper shows how Astell might have persuaded us to accept her severesounding view by sketching the goods that she thinks flow from having an admonisher as a friend. Section three thus contends that, on Astell's view, there is a class of deep truths about who we are that only our admonishing friends can reliably access; section four sketches how admonishment enhances our moral reasoning skills on Astell's picture.