Syed A'la Maududi 21. It is full of important philosophy beginning in Section II which deals with the essential Oneness of God. The theme becomes inspiring in the face of the Prophet's trials, and at the end it becomes almost apocalyptic.
Men turn aside through indifference even though their reckoning approaches.
Indeed, he's a poet. Let him bring us a sign such as the first men were sent with. Before you We have sent only men whom We inspired. We did not grant them bodies which did not eat food, nor were they immortal. Then We confirmed the Promise for them, and saved them as well as anyone We wished to, and wiped out those who were dissipated.