A holy text, in both form and content, is an instrument of awe. The first thing one might notice about them, in many cases, can be their sheer bulk, as if heft must correspond to importance. But it’s often the smaller objects that are most truly impressive, representing examples of discipline, precision, craft, and devotion. That makes this miniature Quran, currently on display in the Palace of Holyroodhouse in Edinburgh, Scotland, a marvel: the totality of a divine scripture within the space of a matchbox. Measuring just 46 x 35…