I have thought some of Nature's journeymen had made men and not made them well, they imitated humanity so abominably.—Shakespeare.
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;