Books let us into their souls and lay open to us the secrets of our own.

This sentence is widely attributed to William Hazlitt in the context of his early‑nineteenth‑century essays on reading and the pleasures of literature, where he treats books as intimate companions and as instruments of self-knowledge. Hazlitt repeatedly argues that great writing does more than convey information: it gives access to another mind’s inner life and, in doing so, awakens latent thoughts and feelings in the reader. The line is typically cited as a standalone aphorism in anthologies and quotation collections rather than with a stable surrounding passage, suggesting it circulated early as a memorable summation of his views on reading.

The sentence proposes a double revelation. First, books “let us into their souls”: reading grants access to an author’s sensibility—temperament, values, and emotional experience—more intimately than ordinary social contact. Second, they “lay open… the secrets of our own”: literature functions as a mirror, giving language and form to half-known thoughts and feelings in the reader. Hazlitt suggests that the deepest value of reading is not information but self-knowledge produced through imaginative sympathy. The “secrets” are not hidden facts but inner motives and emotions that become legible when we encounter them embodied in another mind’s words.