Exodus 28:36 - Ellicott's Commentary On The Whole Bible

Thou shalt make a plate. — The plate is so much of the essence of the mitre that it is put forward first, as that whereto all the rest is subordinate. It was to be “of pure gold,” and “fastened on high upon the mitre” (Exodus 39:31); so catching the eye even more than the breastplate, and drawing men’s special attention. But the plate itself was only the vehicle for an inscription, and thus men’s attention would be especially directed to that. It taught the great truth that religion culminates in “Holiness to Jehovah,” without which all else is worthless — forms, ceremonies, priestly attire, sacrifice, prayer, are mockeries. It required primarily the high priest himself to be holy; but it was a call also to the whole nation, whose representative the high priest was, that they should be “a holy nation,” “a kingdom of priests” (Exodus 19:6), and should consecrate themselves heart and soul to Jehovah.