بسم الله الرحمن الرحيم
The Quraan was revealed for three main purposes:
First, to worship Allah with it by reciting it.
Second, to reflect over its meanings.
Third, to learn lessons from it.
“(This is) a book that We have sent down to you full of blessings, that they may ponder over its verses and that men of understanding may remember.”
[Surat Saad, 38:29]
It is impossible for anyone to take a reminder from the Quraan unless he knows the meaning because someone who does not know the meaning is at the same level as someone who does not even read (it), as Allah says:
“And from them are illiterates who do not know anything of the book except amaaniyy…”
[Surat’l Baqarah, 2:78]
“…except amaaniyy” here means “except mere reading (without understanding the meanings)”.
For this, it is incumbent upon the Muslims to be persistent in seeking to learn the meanings of the Noble Quraan. In this was, he will gain benefit of it and likewise will be following in the footsteps of the Salaf (the pious predecessors). They used to not go beyond ten verses until they fully learned them (as recorded by Ibn Jareer in his tafseer, 1/80), and what they contain of knowledge and action.
Source: ‘Usool At-Tafseer’ by Shaykh Ibn ‘Uthaymeen, pp.143-144.