This particular fresco imagines the person of Joel, a prophet from the Hebrew Bible, whose teachings appear in the Book of Joel. Critics have often commented on the rhythmic posture of the figure, and the artist's use of several inner horizontal lines for the clothing, which stands out when compared to some of the other frescoes. But the most engaging part of the fresco is the face of the central figure, which appears to reveal wisdom, disdain and intense focus all at once; the open scroll in his hands only enhancing this sense of wisdom.
A close-up of the face of the central figure, which reveals wisdom, disdain and intense focus