Barth's theological philosophy came to emphasize "the Word of God, not the faith experience of the individual believer." Given the general trends prominent in Reformed theology at the time of his life, this was a revolutionary suggestion.
Barth's approach continues to impact homiletics today as contemporary sermons are developed. Sermons written under the influence of Barth's theology emphasize the unchanging power and authority of God as recorded in the Bible. Changes in human condition or philosophy are not to be allowed to lead to changes in interpretation of God's will or involvement in creation. Barth's followers develop sermons based on the Bible, the centrality of Jesus Christ to the faith, and the need to base all actions and beliefs upon those foundation points, not to be swayed by popular cultural beliefs or influences.