Wilde's witticism contains a genuine paradox beneath its surface cleverness: the moment advice becomes truly *good*, it loses its personal application—it transforms into something universal enough that only others will benefit from hearing it. We recognize this when a friend offers us counsel we already knew intellectually but hadn't quite admitted to ourselves; the advice lands differently when we give it to someone else, as if speaking it aloud on their behalf somehow validates what we've been avoiding. A therapist recognizing her own patterns in a client's story, or a recovering alcoholic sponsoring someone struggling with the same demons, discovers that wisdom flows outward more readily than inward. Wilde isn't being cynical so much as honest about how self-knowledge works—we tend to see ourselves most clearly in the mirror of others' struggles.