When Christ uttered, in the judgment hall of Pilate, the remarkable words – “I am a king” (John 18:37), he pronounced a sentiment fraught with unspeakable dignity and power. His enemies might deride his pretensions and express their mockery of his claim, by presenting him with a crown of thorns, a reed, and a purple robe, and nailing him to the cross; but in the eyes of unfallen intelligences, he was a king. A higher power presided over that derisive ceremony, and converted it into a real coronation. That crown of thorns was indeed the diadem of empire; that purple robe was the badge of royalty; that fragile reed was the symbol of unbounded power; and that cross the throne of dominion which shall never end.
– J.L. Reynolds, Church Polity of the Kingdom of Christ, in Polity, Dever, Mark, p. 298.