Mephistopheles

And after—first and foremost duty—Of Metaphysics learn the use and beauty! See that you most profoundly gain What does not suit the human brain! A splendid word to serve, you’ll find For what goes in—or won’t go in—your mind. But first, at least this half a year, To order rigidly adhere; Five hours a day, you understand, And when the clock strikes, be on hand! Prepare beforehand for your part With paragraphs all got by heart, So you can better watch, and look That naught is said but what is in the book: Yet in thy writing as unwearied be, As did the Holy Ghost dictate to thee!