Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.
Samuel JohnsonQuack: A boastful pretender to arts which he does not understand. A vain boastful pretender to physick; An artful, tricking practitioner in physick.
Samuel JohnsonTo write is, indeed, no unpleasing employment, when one sentiment readily produces another, and both ideas and expressions present themselves at the first summons; but such happiness, the greatest genius does not always obtain; and common writers know it only to such a degree, as to credit its possibility. Composition is, for the most part, an effort of slow diligence and steady perseverance, to which the mind is dragged by necessity or resolution, and from which the attention is every moment starting to more delightful amusements.
Samuel Johnson