76 Preface وَإِنَّهُ لَقَسَمٌ لَو تَعلَمونَ عَظيمٌYusuf AliAnd that is indeed a mighty adjuration1 if ye but knew,-The glory of the firmament as it exists, and the wonder of its passing away, are both evidence, to the discerning mind, of the Future which God has prepared, but this evidence can only be effective if men “but knew”, i.e., turned their earnest attention to it.