Do they not see into the immensity of the universe and look with their minds' eyes at the realms of the heavens and the earth and the precision with which structures are related and at the unique government of all that He has created! Do they not ponder that the end of their term of life may well be approaching! Therefore, if they refuse to acknowledge the truth as is featured in these signs, what then will convince them if these signs and this divine discourse do not!