If so, I'm sorry.
Faith does come by hearing, and by hearing the Word of God preached. I think the underlying thought there was that faith comes by the proclamation of the Good news of Jesus Christ in the assembly of the Church. Not about somehow knowing (or feeling) what you read is validated.
I had wondered, but only about your opinion of the Scriptures. That is the Mormon basis for their 'burning in the bosom' supposed proof for the validity of their Book of Mormon. And I don't buy that argument from Christians or from Mormons. But once you accept the Scriptures, and it is of course right to accept them, then they are a true basis for knowing Jesus Christ and the Father and their Spirit.
There are loopy Protestants and normal Protestants and I don't have a guidebook at my side to help me figure them all out. I will be happy that you are not loopy.
OK. I was addressing belief and not whether an individual might lose their faith. Even if an individual is OSAS they can make a mess of their beliefs. But that does not address how a person can trust the Bible as the Word of God. For that I referred to Jesus saying that the gates of hell would not prevail against the Church. Which means on matters like this you can trust the Church. And because of 1 Tim 3:15.
And v 14 of Jn 17 gives a clue. It says "I have given them thy word". Jesus conveyed the Father's truth to his followers. He started their assembly, the Church, discipling them closely for three years. That 'word' was active in the Church. Before a bit of the NT was written. And at a suitable time much of that word found it's way into written form as the Church wrote the NT. And preserved it, and copied it, and scrutinized it, and canonized it, and read from it in the liturgy. They didn't just find a Bible laying on the ground, pick it up, look at it, say this is self-authenticating, or this provides a 'burning in the bosom', or whatever, and start passing out copies. The Church wrote the NT. The Church became custodian of the OT. It is the Church which validates the Bible. That was Augustine's point. Everything else is icing on the cake as far as validating the Bible goes.