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 We raised among every people a messenger who enjoined, "Worship God alone and shun the evil one." Then among them were some whom God guided and among them were others who became deserving of ruin. So travel across the earth and observe what was the end of those who rejected the messengers. 36 Though thou art ever so eager to guide them, God guides not those whom He leads astray; they have no helpers. 37 And they swear by Allah their strongest oaths, that Allah will not raise up him who dies. Yes, (He will raise them up), a promise (binding) upon Him in truth, but most of mankind know not. 38 This is in order that He may make clear to them that which they differed upon, and in order that those who disbelieve might know that they were indeed lying. 39 Whenever We will anything to be, We but say unto it Our word "Be" - and it is. 40