Making yourself feel fear of Allaah
This weeping is the fruit of beneficial knowledge, as al-Qurtubi says in his commentary on the verse (interpretation of the meaning): “And they fall down on their faces weeping” [al-Isra’ 17:109].
This is an eloquent description of them and praise for them. It is the duty of everyone who acquires knowledge to reach this level, so that when he hears the Qur’aan he is filled with fear and humility.
In Musnad al-Daarimi it is narrated from Abu Muhammad that al-Taymi said: Whoever is given knowledge and does not weep, he deserves not to have any knowledge, because Allaah has described those who have knowledge; then he recited this verse. Al-Jaami’ li Ahkaam il-Qur’aan, 10/341-342.