When I read the scriptures - especially the New Testament - I experience the gospel message as self-evidently the truth about God from God. I don’t mean that every single assertion has this character, but that there is a cluster of teachings that is self-evident and the cluster includes (or presupposes) God’s existence and his incarnation in Christ. This experience, along with other experiences, are experiences of God speaking, and are often also accompanied by a strong sense of his presence.
The grounds of belief in God is the experience of God: God is not the conclusion of an argument but the subject of an experience report.
Roy Clouser