Those who associate [others with God] say, "If God had so willed we would not have worshipped anything besides Him, neither we nor our fathers, nor would we have forbidden anything without His sanction." So did those who went before them. The duty of the messengers is only to convey the message clearly. 35 And indeed, within every community have We raised up an apostle [entrusted with this message]: "Worship God, and shun the powers of evil!" And among those [past generations] were people whom God graced with His guidance, just as there was among them [many a one] who inevitably fell prey to grievous error: go, then, about the earth and behold what happened in the end to those who gave the lie to the truth! 36 [As for those who are bent on denying the truth - ] though thou be ever so eager to show them the right way, [know that,] verily, God does not bestow His guidance upon any whom He judges to have gone astray; and such shall have none to succour them [on Resurrection Day]. 37 And they swear by Allah their strongest oaths [that] Allah will not resurrect one who dies. But yes - [it is] a true promise [binding] upon Him, but most of the people do not know. 38 In order that He may make clear to them the matter in which they differed, and the disbelievers may realise that they were liars. 39 Our word for a thing when We intend it, is only that We say to it, Be, and it is. 40