Willie Mullan addresses the debate between evolution and creation, emphasizing that God is the true creator of the universe as stated in the Bible. He critiques the evolutionary perspective, arguing that it undermines the biblical account of creation, particularly the significance of Jesus Christ as the creator. Mullan highlights key scriptures, including Hebrews and Genesis, to affirm that God created the world in six literal days and that all things were made through Christ. He encourages believers to stand firm in their faith and understanding of God's creative power, reminding them that the message of the Gospel is centered on Christ. The sermon concludes with a call to recognize God as both Creator and Savior.