They do not have lamp

Abu Abdur Rahman said

“We learned the Qur’an from some people who told us that they used to memorise 10 verses of the Qur’an and never exceeded them, until they had understood their meaning and acted upon them; however, other people would come after them and would learn the whole Qur’an easily but they would never act upon it.’

[Siyar a'laam an-Nubalaa' 4/269]

Iyyas ibn Mu’awiyah said:

“The example of a people who recite the Qur’an and do not know its explanation is like a group of people who have a written message from their king that comes to them during the night, and they do not have a lamp. Therefore, they do not know what is in the message. The example of one who knows tafseer is like a person who comes to them with a lamp and reads to them what is in the message.”