Authors:
  • Men are four;
    He who knows and knows not that he knows. He is asleep; wake him.
    He who knows not and knows not that he knows not. He is a fool; shun him.
    He who knows not and knows that he knows not. He is a child; teach him.
    He who knows and knows that he knows. He is a king; follow him.
    The heights by great men reached and kept
    Were not attained by sudden flight,
    But they, while their companions slept,
    Were toiling upward in the night.