326 AN ARAB PROVERB 



of demoralization before I classified my strange intruder. 

 My musing had prevented my noticing the unmistakable 

 sound of his gait. 



Why the above should suggest it, I wot not ; but here 

 is a terse and characteristic Arab proverb, which 1 pray 

 you to read, learn, mark, and inwardly digest. 



" Mankind is of four classes : 



"He who knows not, and knows not that he knows not, 

 is a fool. Shun him. 



" He who knows not, and knows that he knows not, is 

 simple. Teach him. 



"He who knows, and knows not that he knows, is asleep. 

 Wake him. 



" He who knows, and knows that he knows, is wise. 

 Follow him." 



