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 If thou art solicitous for their guidance, then verily Allah guideth not whomsoever He sendeth astray, and for them there are no helpers. 37 They swear their strongest oaths by God that God will never raise the dead to life -- nonetheless, it is a promise truly binding on Him, even though most people do not realize it -- 38 so that He may make clear to them that whereon they were at variance, and that the unbelievers may know that they were truly liars. 39 (As for the possibility of resurrection, bear in mind that) whenever We do will something, We have to do no more than say: "Be", and it is. 40