And those who do not expect the meeting with Us say, "Why were not angels sent down to us, or [why] do we [not] see our Lord?" They have certainly become arrogant within themselves and [become] insolent with great insolence.
And those who disbelieve say, "Why was the Qur’ān not revealed to him all at once?" Thus [it is] that We may strengthen thereby your heart. And We have spaced it distinctly.