The title written in three languages signifies that our Lord was King of the whole world; practical, natural, and spiritual1. The Latin denotes the practical, because the Roman empire was the most powerful, and best managed one; the Greek the physical, the Greeks being the best physical philosophers; and, lastly, the Hebrew the theological, because the Jews had been made the depositaries of religious knowledge.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).