Pastor Carl Creasman's sermon on the battles within the church focuses on James' teachings to guide believers to live faithfully. He explores the importance of aligning our passions with God's will and avoiding worldly distractions. Pastor Carl emphasizes the need for self-reflection and humility in pursuing transformation and drawing closer to God. The sermon calls for believers to resist worldly temptations, purify their hearts, and seek to live in accordance with God's word.