Opens with a rapid sequence of cosmic upheavals — sun darkened, stars falling, seas boiling over — announcing judgment day in vivid, compressed imagery. Also contains a firm defense of Muhammad as neither mad nor possessed, and a genuine recipient of revelation, not a self-appointed poet. It closes with a firm statement that Muhammad was not mad, had genuinely seen the angel of revelation on the clear horizon, and was not withholding knowledge out of stinginess — directly rebutting three separate accusations in quick succession. It briefly reflects on the practice of female infanticide, asking on judgment day for what crime the buried infant girl was killed — directly confronting a real, documented pre-Islamic Arabian practice rather than addressing it only abstractly.
Vivid, compressed imagery meant to shake complacency — plus a defense of Muhammad's sanity and sincerity. That triple rebuttal in close succession is often studied as evidence of exactly what specific accusations Muhammad faced at the time, giving historians a fairly precise picture of early Meccan objections. That direct confrontation of female infanticide is frequently cited as one of the clearest, earliest scriptural condemnations of the practice, cited in discussions of the Quran's stated concern for protecting vulnerable and voiceless victims specifically.