Imaam Maalik (d.179H) رحمه الله was asked about, what is the most beneficial thing that will strengthen the memory? He replied: ”If anything would strengthen it, it would be the abandonment of sins.” [Al-Jaami’ li akhlaaq al-raawee wa aadaab al-saami’ 2/258] ibn Mas’ood radi Allaahu ‘anhu said: “Indeed I consider that a man (might) forget knowledge which he has already learned because of a sin which he does.” And may Allaah have mercy upon ash Shaafi’ee who said: “I complained to Wake