While evangelical leaders and some of their critics debate the complexities of Trintarian theology (thanks, mind you, to prior considerations of the relations between the sexes – ahem), please keep in mind two points.
First, evangelical Protestants never — NEH VEH — cared about Nicea. If they knew about Nicea, they certainly didn’t know the Council of Constantinople of 381 (wasn’t that a Muslim city?). Just look at some evangelical statements on the Trinity:
God has revealed himself to be the living and true God, perfect in love and righteous in all his ways, one in essence, existing eternally in the three persons of the Trinity: Father, Son, and Holy Spirit. (Fuller Seminary, flagship seminary of the neo-evangelical movement)
We believe that there is one God, eternally existent in three persons: Father, Son and Holy Spirit. (National Association of Evangelicals)
By way of comparison:
In the unity of the Godhead there be three persons, of one substance, power, and eternity: God the Father, God the Son, and God the Holy Ghost: the Father is of none, neither begotten, nor proceeding; the Son is eternally begotten of the Father; the Holy Ghost eternally proceeding from the Father and the Son. (OPC Confession of Faith 2.3)
Our Churches, with common consent, do teach that the decree of the Council of Nicaea concerning the Unity of the Divine Essence and concerning the Three Persons, is true and to be believed without any doubting; that is to say, there is one Divine Essence which is called and which is God: eternal, without body, without parts, of infinite power, wisdom, and goodness, the Maker and Preserver of all things, visible and invisible; and yet there are three Persons, of the same essence and power, who also are coeternal, the Father, the Son, and the Holy Ghost. And the term “person” they use as the Fathers have used it, to signify, not a part or quality in another, but that which subsists of itself. (Augsburg Confession)
So when Carl Trueman writes:
In light of the last few weeks, the American conservative evangelical movement as a whole has been exposed as theologically thin in its doctrine and historically eccentric in its priorities. As the war of words dies down, the subsequent peace must bring with it ecumenical consequences. It cannot simply involve papering over the obvious cracks in order to return to gospel business as usual.
Does he really mean to say “the last few weeks”? What about the last century does he not appreciate?
The second point to consider is how parachurch this entire debate is. As Jake Meador observes, evangelicals don’t debate well:
And so we continue to go around the maddening how-evangelicals-debate cul de sac: Dr. Trueman has long complained that evangelicalism is driven more by cultural concerns, like complementarianism, and a celebrity pastor complex than by sincere concern with faithful preaching and ministry. In the way he makes these critiques, he has sometimes been excessively aggressive, thereby making it far less likely that people will hear his real concerns or weigh whether or not there is any truth in them at all. He is, instead, easily dismissed as a crank.
One reason is that the means for conducting debate are parachurch institutions, not church assemblies, committees, reports, and debates.
So while evangelicals debate the Trinity — THE TRINITY!! — Orthodox Presbyterians were discussing the doctrine of republication.
Evangelicals really should join a confessional church. The water is warm.