Someone told me that there is no use in "memorizing" the Qur’ân because the purpose of the Qur’ân is to guide and instruct, not to be committed to memory. Similarly, he claimed that there is no use in learning proper tajwîd (pronunciation), because the Qur’ân was revealed for its laws to be obeyed.
Sheikh Nâsir al-Mâjid, professor at al-Imâm University in Riyadh
It is one of the noblest acts to be engaged in the Qur’ân by memorizing it and learning it. Our Prophet (peace be upon him) said: “Whoever reads one letter of Allah’s book will be rewarded one good deed and the good deed doubles to ten times. I do not say “Alif Lâm Mîm” is one letter, but Alif is one letter, Lâm is one letter, and Mîm is one letter. [Sunan al-Tirmidhî]
This hadîth does not differentiate between those who understand Arabic and those who do not. Moreover, the example chosen by the Prophet (peace be upon him) is not something that has a meaning that even an Arab can understand. However, there is virtue in its very recitation.
Admittedly, a Muslim should learn Arabic in order to understand the Qur’ân and to understand his religion.
The Prophet (peace be upon him) said: “Learn the Qur’ân, preserve it, and recite it in a beautiful, musical manner, because it is swifter in escaping (from your memory) than the camels are from their hobbles. [Musnad Ahmad]
This hadîth shows that memorizing the Qur’ân is a virtuous and rewardable act. The Prophet (peace be upon him) also encourages us to recite the Qur’ân beautifully, and he encourages us to revise the Qur’ân often lest we forget what we have memorized.
Source: Islam Today
-- Al Arabiya Digital