The quote that came to my mind is from Hannah Arendt, who remarked about the poet Auden that his face revealed the invisible struggles and passions within his heart. This suggests that genuine emotion and internal conflict are often visible on a person's exterior, especially in someone as expressive as a poet.

John Boyne's book, The Heart's Invisible Furies, explores themes of identity, emotion, and the hidden depths of human experience. The quote beautifully encapsulates how inner feelings—though unseen—can manifest outwardly in one's appearance, highlighting the profound connection between internal and external worlds.