J.P. Moreland argues that sola scriptura involves a commitment to the final authority of the inerrant word of God in all matters, but not to the idea that it is the sole source of moral and theologically relevant knowledge. Just as an archeological dig could discover more information about an ancient city described in the Bible--though we would not accept alleged discoveries that contradicted scripture--so there are three areas where extra-biblical knowledge is available--knowledge of God and morality in the creation, knowledge of the soul and demons by interacting with and studying them, and knowledge of God's will though guidance in various ways.
Kingdom Triangle is relevant to this paper’s conclusion in three basic ways: First, it provides a commendable balance between a recovery of the Christian mind, renovation of the soul, and a restoration of the Spirit’s power so that an over-emphasis on an extra-biblical source of knowledge is discouraged. Second, it explains what knowledge is and what it is not. Moreover, it answers questions about how one would approach extra-biblical knowledge. Third, it gives more detail about the demonic and God’s guidance and speaking.
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