Mary Virginia Provines said this quote

Someone has said of books that they are our 'amplest heritages' of thought, and so they are. That doesn't necessarily mean that they must be learned or profound. They are food for the mind and different minds require different foods ; everyone is better for variety. Whatever stimulates the mind feeds it, be it fact, fiction or fable. That is where our responsibility lies ; in knowing what builds good mental blood and brawn, and in dispensing that only. Don't ever let yourself think you haven't time to read.