Emerson makes a subtle but radical claim: that influence works beneath conscious memory, shaping us through accumulated experience rather than retained facts. Most of us fret about forgetting details from books we've read, as if the value lies in our ability to recite them—but he's suggesting that the real work of reading happens invisibly, like digestion itself, where the body transforms food into bone and blood without our tracking each nutrient. When you find yourself making a decision based on some half-remembered principle, or noticing you've adopted a phrase from a novel you read years ago, you're witnessing Emerson's point in action: the books have remade you without requiring you to remember them.