'The right of your subjects through the knowledge you possess is to know that Allah has made you a custodian over them on account of the knowledge He has bestowed on you and the storehouses [of wisdom] which He has opened up for you. If you teach people well, and do not mistreat them, and do not get bored of [teaching] them, then Allah will increase His grace upon you. But if you withhold your knowledge from people or treat them harshly when they seek knowledge from you, then it will be Allah's right to deprive you of knowledge and its magnificence, and to make you fall from your place in the people's hearts.'