The sermon explores the consequences of intermingling faith and ungodliness, drawing from the narrative of Noah and the Nephilim to caution against blurring the lines between believers and the world. It highlights the importance of covenant fidelity, emphasizing the need for discerning relationships, diligent parenting rooted in scripture, and a steadfast devotion to God's word, ultimately pointing to Christ as the ultimate source of rest and redemption, contrasting with the fleeting nature of earthly life and the judgment that followed the wickedness of mankind.