The Trinity as a doctrine is complex in trying to explain how three entities are really one in being. That they can retain their separate nature, but still be one God. Such a doctrine can only be supported by the New Testament by ignoring the overwhelming scriptural references to the contrary, and by broadly interpreting a few passages to support the Triune God theory.
Trinitarians ignore no scriptural references, since we affirm that the Father, Son, and Holy Spirit are distinct Persons. You are confusing Trinitarianism with the heresy of Modalism, which is quite common due to a fundamental misunderstanding of how the word “being” is used in Trinitarian doctrine, which is not the same as how it is used today, interchangeably with “person”.
Also, your definition of the Trinity above (“they can retain their separate nature, but still be one God”) is not a definition used by Trinitarians. We believe that the 3 Persons are of
one nature, the divine nature.
The Godhead as a doctrine is simple and follows completely the New Testament teaching: God the Father, Jesus Christ, and the Holy Ghost as being one in divine purpose. They are one eternal God metaphorically because of this divine oneness, but still retain their individual nature as confirmed by the Bible.
And Trinitarians believe that the Father, Son, and Holy Spirit retain their individual characteristics, which make them distinct Persons, and not confused with each other. Again, you seem to be confusing Modalism (a heresy) for Trinitarianism.
I believe If the early apostles wanted man to understand the Trinity as you are describing it they would they have explained this to us in their writings more explicitly. They would not have required a council 300 years later to piece it together. The Bible does not explain all doctrines of the gospel in great detail, but you would think this one – being so important to Christianity – would have had a bit more explanation.
This is not a logical conclusion, since we can similarly ask why the apostles never claimed that the Father was once a man, or married to the Heavenly Mother, which seem to be important issues in understanding the nature of God (especially when such ideas are paralleled with our own future in Mormon exaltation). The length of time is irrelevant, since we know that the Bible itself spans a
very long time period, bringing up doctrinal issues throughout.
Also, RebeccaJ addressed the reason why the Nicene Council was called, due to the heresy of Arianism, which claimed that Jesus was created by the Father (which reminds me of the LDS idea of Jesus being the literal firstborn of the Father).
God is my Father and I pray to him just as Jesus taught us to. Jesus Christ is my Savior and I worship him and know that only through him can I come unto the Father as he declared it to be. I know the Holy Ghost is the revealer of all truth and my comforter as Jesus proclaimed. Latter-day Saints follow this pattern of belief as outlined in the New Testament.
So do Trinitarians.
Are they three Gods? Apparently, as we have no other word that can describe such beings except to call them gods.
Which of course is an idea found nowhere in the Bible, if we are still claiming that the Mormon Godhead doctrine is completely Biblical.
We believe that they are three Persons.
Are the separate beings? Yes, the Bible is clear about that.
What is the definition of “being” that you are using? It is not the same as that used by Trinitarians. The way that you are using “being” is the way that we use “Person”, since we believe that the Father, Son, and Holy Spirit are real, distinct Persons, who are not confused with each other. When we Trinitarians talk about them being “one Being”, we aren’t talking about them being “one Person”, or “aspects of each other”, or any other heresy. Again, you seem to be confusing Modalism with the Trinity, as the other people in the OP do as well.