The trinitarian claim that the Trinity is progressively revealed in the Old Testament is like the JW claim that the light is getting brighter and brighter. Because it hasn't actually been progressive with the JWs they've used the "tacking" explanation, claiming that they sometimes go a bit left and sometimes a bit right just as a ship does toward its destination while being buffeted by contrary winds.
But JWs have actually reversed themselves with some of their teachings and have gone in an opposite direction. The light has, so to speak, gone from bright to dim to bright and then back to dim again or completely out.
If trinitarians were truly honest, they would acknowledge that they are no better than the JWs. There has been absolutely no progressive revelation of the Trinity in the Old Testament. If trinitarians were right, we would see the revelation starting off with a bang in Genesis 1:1 where elohim for God is a plural noun. Then in verse 26 the plural "us" and "our" give the appearance in the following verse of becoming a singular pronoun.
Where is the "progression" from then on? The Old Testament thereafter describes God with singular pronouns over 11,000 times! Singular pronouns tell us that God is a single personality. If he were a trinity, we should expect to see him using the plural pronouns more and more, but such is not the case. A similar case can be made regarding the use of elohim. After its use reaches a peak in Psalms, the largest book, it almost continuously diminishes in use in the books that follow Psalms.
So, are the trinitarians any more honest than the JWs? Are they any less stubborn? Trinitarians have been around much longer than the JWs. They've had plenty of time to re-assess their belief in the light of increasing knowledge of Bible languages and the solid history of their doctrine's pagan origins. Instead of moving closer to what the Bible actually teaches, they continue to drift further away.
herk