Say: "As to the knowledge of the time, it is with Allah alone: I am (sent) only to warn plainly in public." (26)
Tafsir
When the addressee is not convinced by reasoning, the preacher repeats his utterances of firm faith and thus stirs his inner self into awakening. Even if there is the slightest sensitivity in a man, these last utterances are enough to make him feel the urge to reform himself. But one whose conscience has been completely blunted, can never be awakened by any device.
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