There is no personal charm so great as the charm of a cheerful temperament.

Van Dyke’s line elevates temperament—an enduring disposition—above superficial attractiveness or cultivated social graces. “Personal charm” is framed not as something performed but as something emanating from a stable inner attitude: cheerfulness. The claim implies that optimism and good humor make a person more approachable, resilient, and generous in everyday interactions, creating a kind of moral-aesthetic appeal that outlasts beauty, wit, or status. It also carries a gentle ethical suggestion: cultivating cheerfulness is a form of character work that benefits others, since a buoyant spirit can lighten social life and encourage hope in difficult circumstances.