The classical scholars of this sublime religion have also confessed that their knowledge was deeply limited. Imam Abu Yusuf was consulted on an issue by the Caliph Harun al-Rashid. Imam Abu Yusuf answered by saying, “I do not know.” The assistant to the Caliph said to Abu Yusuf: “You have a salary and you say you do not know.” In response, the great scholar Abu Yusuf said: “My salary is according to my knowledge. If it were according to my ignorance, the treasury of the state would not suffice.”