'A man once came to the Prophet (SAWA) asking, ?O Prophet of Allah, what is knowledge?' to which he replied, 'Paying attention [being silent].' The man asked, 'Then what?' He replied, 'Listening.' He asked, 'Then what?' The Prophet replied, memorising.' The man asked, 'Then what?' He replied, 'Acting upon it.' He asked, 'Then what O Prophet of Allah', to which he replied, 'Spreading it.'