Reading is like fetching water with a bamboo basket. The water is gone when it is fetched up, and the water is gone when it is fetched up again. But after a long time, you will find that although the water is not fetched up, the basket is clean... So it doesn't matter if you can't remember what you read, but the soul has been sublimated... Learning to nourish the body, learning is not to know some methodologies, but to form a reflex of action, or gradually reach the reflex of wisdom.