“By the clear Book” (al-Zukhruf 43:2).
“An Arabic Qur’an so that you may understand” (Yūsuf 12:2).
“A Book whose verses have been made firm and then explained in detail by One All-Wise, All-Aware” (Hūd 11:1).
Clarity, Arabic expression, and coherent exposition are central qualities of Qur’anic discourse. The need to interpret particular passages does not contradict them: that need may arise from the reader’s knowledge or the contextual requirements of the expression.