“God is not ashamed to strike a similitude even of a gnat, or aught above it. As for the believers, they know it is the truth from their Lord; but as for unbelievers, they say, ‘What did God desire by this for a similitude?’ Thereby He leads many astray, and thereby He guides many; and thereby He leads none astray save the ungodly”
~ Holy Quran 2:26 (A. J. Arberry)