Create a portrait of a wise old man, seated in an ancient library. The medium is charcoal on paper, emphasizing textures and shadows. The style is minimalist, capturing only the essential features and details. In the composition, the sage's face is centered, looking directly into the camera, against a blurred background of books. The color scheme is limited to shades of charcoal gray, with subtle white highlights on the face and eyes. The lighting features a single beam illuminating the face, highlighting signs of wisdom like wrinkles and an intense gaze. --ar 9:16