A Schizophrenic Trinity?

Thoughtful theist: God would simply be strictly identical to the plurality of the three divine persons.

Blü:  No. God would be strictly identical not onto to the plurality of the three, but simultaneously strictly identical to EACH of them.

Neither is correct.  God is a single entity with three personalities striving for dominance only one of which can be expressed at any one time.  And this all before there were serotonin antagonists to help. 

For the Jews the angry, vengeful, murderous, personality was dominant, although the priestly rule-maker tried to keep the people under control, and the storyteller Jahwist tried to make sense of it all for humans. 

For Catholics and many Christians the forgiving, empathetic and human centered personality is dominant, although he seems to have had trouble keeping the "My Way or the Highway" rule-maker under control, especially when the political pressure on the humanist became too intense and he had to suppress that personality. 

Other Christians focus on the "My Way" personality. 

It is very simple they all worship God, and the necessary personality shows up at the right time.
In other words if you want vengeance you pray to the father manifestation of the schizophrenic God; if you want mercy pray to the son manifestation; and if you want wisdom pray to the ghost manifestation. 

Probably why prayers are sung.  The music wakes up the right manifestation.  When you pray a Kyrie Eleison or an Ave Maria it alerts the son that He ought to pay attention.  When you pray a Dies Irae you alert dad that somebody needs to be terrified.   And a Psalm alerts the ghost that you need help with the interpretation.