How do we know that faith is more than just head knowledge?

Faith cannot be reduced to mere intellectual acknowledgment of Gospel truths; it is evidenced through a transformed life, which involves our affections being aligned with God's truth. When the Holy Spirit regenerates a believer, it results not only in belief but also in the manifestation of fruit such as love, joy, and peace as outlined in Galatians 5:22. Therefore, the authenticity of faith is shown through the outpouring of this fruit, which confirms that one's understanding of the Gospel is not just academic but life-changing.