yes many people read the bible with presuppositions. For example Jesus is not God. So what they do is every passage that speaks of His Deity they will automatically deny and give a bunch of excuses on why He cannot be God.
I think
we all read the Bible with presuppositions, civic.
That's why we should agree on a method to follow. I don't know what method is best.
I could only propose mine, but even in the act of proposing it, I am doing it biased, with presuppositions.
MY SUGGESTED METHOD TO APPROACH SCRIPTURE REGARDING THE TRINITY
First, I would try to get a
knowledge of how Jews conceived God, particularly at the time of Jesus. This is because Jesus was a Jew, his disciples were Jews, the crowds were Jews, Pharisees, Saducees and doctors of the Law were Jews, Paul was Jew. The Tanakh they quoted conveyed the Jewish concept of God. Since Christianism was not considered at first an independent religion, but a sect of Judaism, something as essential as the concept of God should not be radically different.
Second, I would be to
give priority to passages where it is Jesus who speaks about Himself and His Father... even more if we can peer into an intimate conversation between Jesus and His Father. So, the gospels would be the first thing to read, and then I would try to interpret apostolic letters and speeches in the light of the gospels.
Third, I would examine with special interest verses in which
God and Jesus or God and the Holy Spirit are presented by a third party next to each other, preferably within the same sentence, so that any shared identity or any separation is more evident.
Fourth, I would look at the
number of verses/sentences above where one position or the opposite is presented. If the position A is presented, say, 80% of the time, and B is presented 20% of the time, I would go for A.
Fifth, if the steps above do not solve the question, I would apply the
Occham's razor: Which of the two explanations is the simplest?
Finally, I would apply a kind of "
spiritual Occham's razor". A question like
Which of the two explanations helps me more to love God and my neighbor?