Surah 26. Ash-Shuara, Ayah 200

I.e., not to take root in their hearts, but to "go into one ear and out of the other". As regards Clod's "causing" this to happen, see surah {2}, note [7], and surah {14}, note [4].

"Thus" I think means through the medium of the Arabic language and the Arab people. The Qur-an penetrated through their language and their hearts. If the hard-hearted among them did not believe, they will see when the Penalty comes, how grievous a mistake they made. For the Penalty must come; even when they least expected it. They will be caught saying or thinking, "There is plenty of time; we can get another respite," when already it will have become too late for them to turn over a new leaf.