38 Preface فَلا أُقسِمُ بِما تُبصِرونَYusuf AliSo I do call to witness1 what ye see,This is an adjuration in the same form as that which occurs in 56:75, 70:40, 90:1, and elsewhere. God’s Word is the quintessence of Truth. But what if someone doubts whether a particular message is God’s Word communicated through His Messenger, or merely an imaginary tale presented by a poet, or a soothsayer’s vain prophecy? Then we have to examine it in the light of our highest spiritual faculties. The witness to that Word is what we know in the visible world, in which falsehood in the long run gives place to truth, and what we know in the invisible world, through our highest spiritual faculties. We are asked to examine and test it in both these ways.