Such as fear not the meeting with Us (for Judgment) say: "Why are not the angels sent down to us, or (why) do we not see our Lord?" Indeed they have an arrogant conceit of themselves, and mighty is the insolence of their impiety!
Those who reject Faith say: "Why is not the Qur´an revealed to him all at once? Thus (is it revealed), that We may strengthen thy heart thereby, and We have rehearsed it to thee in slow, well-arranged stages, gradually.
And the people of Noah,- when they rejected the messengers, We drowned them, and We made them as a Sign for mankind; and We have prepared for (all) wrong-doers a grievous Penalty;-
And the (Unbelievers) must indeed have passed by the town on which was rained a shower of evil: did they not then see it (with their own eyes)? But they fear not the Resurrection.