He used this because he wanted to show significance of gods and trying to show how important something may be. I also think he could have used it to send the reader an image as to what he was trying to say. He used something of great value and put it into his words to express something. The last reason he used this term is to make a connection between text maybe to make his text a bit more clever. My reasoning for why he directly chose Diana is because other than him referencing to other gods in the past he references to Diana right now because she is characterized as heavenly and divine so this means she is a excellent person to be acquaintanced by or someone fair and kind.
