This sermon addresses the topic of sexual immorality in the context of Christian living, emphasizing God's call for believers to live holy lives. Pastor Ricks discusses the importance of understanding true grace, which empowers believers to meet God's standards rather than excusing sin. He explains that sexual immorality is indeed a sin, as it misses God's mark for holy living. The sermon also highlights the role of Jesus as our advocate when we fall short, encouraging believers to aim for God's standard while resting in Christ's finished work on the cross.