It is often said that "the apple does not fall far from the tree", meaning that we are often molded by our family or environment. Our views are many times formed by what our parents or grandparents or friends believe, or church teaches, accepting without question what is considered as "truth", failing to do any sort of serious research.
The churches have taught that the Trinity is "doctrine" and those who do not accept it are "heretics". Caught in the middle of this crossfire is the Bible. What does the Bible teach regarding God, Jesus and the holy spirit ? And here is a clue as to how to find the correct answer, that a person has to be like "young children" ("babes", KJV), humble, teachable, reasonable.(Matt 11:25; Phil 4:5)
When a person is a "dyed in the wool" Baptist (as my mother was for a while), for example, they have already shut the door to reasoning on the Bible, unless they are willing to use their faculty of reason rather than stubbornness. But just as a juror must not be biased or prejudiced in order to be selected for a court trial, so likewise in reading the Bible. These ones must be serious in searching for what is the "truth" rather than allowing hearsay or other "views" to determine his stance.
Here are some details that point to who God, Jesus and what the holy spirit is. For instance, at John 4, Jesus tells the Samaritan woman that "you worship what you do not know; we worship what we know, because salvation begins with the Jews. Nevertheless, the hour is coming, and it is now, when the true worshippers will worship the Father with spirit and truth, for indeed, the Father is looking for ones like these to worship him. God is a Spirit, and those worshipping him must worship with spirit and truth."(John 4:22, 24)
What can be gleaned from Jesus words here ? One that Jesus worships the Father just as other Jews and second, that Jesus said the Father alone was to be worshipped and third that "God is a Spirit", not flesh and blood. Hence, how could Jesus be God and yet worship God ?
Remember, those who allow reasonableness and child-like humility to dictate rather than stubbornness are able to see this more clearly. Just as a juror has to weigh evidence to determine a person's guilt or innocence, so likewise a person who wants to find what is the "truth". One who is hasty because of having a predetermined or unalterable view without carefully considering the evidence will "end up with loss".(Prov 21:5, Common English Bible)
Here is a question to give solemn thought to: If Jesus was equal to God, why did he refer to God as his Father and not as his brother ? Brothers are equal within a household, but a father and son are not. Could Jesus be said to be perfect, without sin if he used family connections that were not accurate ?
And here is another thought to mull over. If God, Jesus and the holy spirit were part of a "Godhead", why is the pronoun "he" (or "I") used instead of the pronoun "them" (or "they") when speaking of God ? For example, at Isaiah 42:8, it says: "I (not we) am Jehovah, That is my (not our) name."
Or at Genesis 2:2, it says: "And by the seventh day God had completed the work that he (not them) had been doing, and he (not them) began to rest on the seventh day from all his (not their) that he (not them) had been doing." And this is consistent throughout the Bible.
At Deuteronomy 6:4, Moses said to the nation of Israel: "Listen, O Israel, Jehovah our God is one Jehovah". Why did Moses tell this to the Israelites ? Because the land of Egypt from they had come out of some 40 years earlier was a nation that had trinitarian gods, such as the popular triad of Osiris, Isis and Horus. In fact, in the tomb of Thutmose III was found the names of some 740 of Egypt's gods.
So, in order for the nation of Israel to accurately know who God was, they had to remove from their thoughts that God is composed of a trinity and realize that God is "one Jehovah", not three Jehovah. And then there is Jesus words to Mary: "I am ascending to my Father and your Father and to my God and your God."(John 20:17)
If the "apple does not fall far from the tree", then these ones will discount the evidence and stick with the status quo of the Trinity, while a few will reason on the evidence to see that when Jesus said he was the Son, he meant just that.(see John 5:22)