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 assuredly We have raised in every community an apostle saying: worship Allah and avoid the devil. Then of them were some whom Allah guided, and of them were some upon whom the straying was justified. Wherefore travel about on the earth, and look on what wise hath been the end of the disbelievers. 36 Even if you are eager to guide them, God does not surely guide those who have gone astray: They will have no one to help them. 37 As it is, they swear by God with their most solemn oaths, "Never will God raise from the dead anyone who has died!" Yea indeed! [This very thing has God promised] by a promise which He has willed upon Himself; but most people know it not. 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 When We decree a thing, We only say: 'Be' and it is. 40