@AdamHeeg Speaking for myself, I grew up immersed in Swedenborgian beliefs and Bible interpretations. So in a sense it was "easy" for me to believe. However, when I was young I still had some nervousness that perhaps these beliefs were wrong, and maybe the Bible really did mean the things that the Protestants and Catholics said it did.
So I spent much time in my 20s and 30s "searching the scriptures" and seeing if those doctrines were really in there. And the more I looked, and the more I engaged primarily with the more fundamentalist end of Protestantism, the more I realized that many of the fundamental doctrines of both Protestantism and Catholicism simply are not stated in the Bible.
Over time, as I've continued to engage with traditional Christians and read all the Bible passages they quote in support of their doctrines, my confidence has only grown that Swedenborg was write, that his doctrines are solidly founded on the Bible, and that traditional Christianity has departed very far not only from the spirit of the Bible but from the original meaning of the Bible text that they quote in support of their doctrines.
For me, this has been a decades-long process of engaging with those of other beliefs, reading their materials, reading the Bible passages they quote in their wider context in the Bible, and searching out a better understanding of what those Bible passages meant in their original historical and cultural context, and what is the spirit behind those meanings.
So when I was young, I reflexively disagreed with most of the fundamentals of Catholic and Protestant doctrine because that's what I'd been taught from birth. But today I disagree with them because I see clearly that they are not based on what the Bible actually says, and in many cases are in direct conflict with plain statements in the Bible.
And beyond that, I look at what those doctrines have led to in the attitudes and practices in those churches as traditionally practiced, and Jesus' statement that "you will know them by their fruits" has come into effect.
Such doctrines as the Trinity of Persons, Original Sin, and in Protestantism faith alone, penal substitution, and so on are not only not stated in the Bible, but they have, as I see it, led to a destruction of the religion of Jesus Christ, which was based above all on love for God and love for the neighbor, including love for enemies.
The history of Catholicism and Protestantism is rife with the opposites of those fundamental teachings of Jesus. And even today, those who cling most closely to these doctrines also tend to be the ones most intolerant of people of other faiths and religions, and most likely to consign to hell people of other churches and faiths who, in all practical reality, practice Jesus' teachings of love for God and the neighbor far more fully than those faux "Christians" do.
When Jesus articulated what distinguished his followers from others, he did not talk about dogmas and articles of faith. He said, instead:
> I give you a new commandment, that you love one another. Just as I have loved you, you also should love one another. By this everyone will know that you are my disciples, if you have love for one another. (John 13:34-35, italics added)
I don't think Jesus meant loving only those who were part of their group. I think he meant love for all, including enemies, just as he articulated elsewhere. I believe that traditional Christianity has heavily failed when it comes to what Jesus Christ himself taught would distinguish his followers from people who weren't his followers.
Of course, there are many people who belong to traditional Christian churches who are good, loving people, and true Christians. But in my experience, the more "Christians" cling to the false dogmas of traditional Christianity, and insist upon them as essentials of Christianity, the less they live by what Jesus Christ himself taught about what makes a person a Christian.
So that, to me, adds to the lack of Biblical basis for those dogmas to assure me that those dogmas are false, and those who taught them were not led by the Holy Spirit to arrive at those doctrines, but rather were driven by human political, financial, and personal factors to invent doctrines not taught in the Bible.