Good stuff Delson. I didn’t know that “son of…” meant “one and the same” to the Jewish people.
I have a question related to that though. What about the fact that angels are sometimes called “sons of God” in the Bible? And I think David is somewhere called that also. How are we supposed to understand those references?
As with all idiomatic expressions, even those we use in English, there is a literal meaning and of course the idiomatic one that grows out from it.
To illustrate, in English we have an idiomatic saying: “He came out of the closet.”
Currently this expression means to admit publicly something about oneself that was kept private. You will hear similar idioms based on this expression such as: “I’m a closet reality television junkie.” Or: “She is a closet science nerd.”
The idiom originated in the late 1970s in reference to people who were no longer afraid of publicly admitting that they were homosexual. It came from an even older idiom: “He (or she) is in the closet.” This older idiom meant that a person lived a hidden homosexual lifestyle.
Again today the expression is now used to admit to anything once held back as secret about oneself that you are now going public with. The expression that was once only a reference to homosexual activity has itself “come out of the closet,” so to speak.
Of course, this is not just an idiom. It has a literal meaning too. One can physically walk in and physically come out of a closet.
It is the same within expressions in Hebrew like “son of.” It can be used to mean a literal offspring or someone begotten or adopted by another. Angels, being creations of God, are thus “sons of God,” and Isaac is the literal “son of Abraham.”
But as you mentioned, Israel’s kings were often referred to as “sons of God.” The reason? The nation of Israel under the dynasty of King David was itself a physical expression of God’s reign. Here we have an early example of the phrase being adapted for idiomatic use. Such a king reflected the very rule of God when they remained faithful to Torah and the voice of God’s prophets and priests. Disobeying the king under these circumstances was tantamount to disobeying an expression of God himself as displayed in the rule of the king.
Another trait of Jewish culture is never to say things directly as to avoid rude speech or even being held accountable for making a statement you may later regret. So a lot (and I mean A LOT) of expressions developed that could be taken in more ways than one.
Two famous examples are expressions used by Jesus, namely “son of man” and “you say so.”
“Son of man” can mean a plethora of things, including something similar to “me, myself.” Another way of translating Matthew 16:13 where Jesus asks his disciples who the Son of Man is can be: “Who do people say that I myself am?”
“You say so” is another way of saying “yes” but without being held accountable for your affirmation. It was used in legal cases. Remember when the high priest put Jesus under oath and demanded he say whether or not he was the Messiah? Jesus answered: “You have said so.”–Matthew 26:63-64a.
And why did the high priest charge Jesus with blasphemy when Jesus said he will see the Son of Man seated next to God on high? Because the expression also sounded like this:
From now on you will see me, myself seated at the right hand of Power and coming on the clouds of heaven.–Matthew 26:64b-65.
So the expression you speak about means more than just one thing.
The Trinity is not a facet of God that can be grasped with human reason. Being as transcendent as God himself it requires faith. It is therefore not an accident that many of the texts in Scripture in reference to the Trinity can be translated in several ways and still be technically acceptable. However through faith Christians see in these texts that there is a deeper meaning under the often literal rendition of many of these phrases and words. The way they end up translating these is thus an expression of seeing the text through eyes of faith.
Like the many word plays of Hebrew culture, it is often up to the hearer to decide the true meaning behind the words being used. Those who see only the surface reap what’s on the surface. Those who dig deeper will reap anything that’s hidden beneath.