John Vissers preaches on Jonah's experience in the depths of despair, emphasizing how Jonah faced imminent death and judgment but found salvation through God's mercy. The sermon highlights the transformative power of the phrase 'but the Lord,' illustrating how God intervenes in our darkest moments. Jonah's prayer from inside the fish serves as a model for acknowledging our crises and recognizing God's sovereignty and faithfulness. Vissers draws parallels between Jonah's experience and the broader theme of salvation, encouraging believers to trust in God's grace even in dire circumstances. Ultimately, the message is one of hope and thanksgiving for God's deliverance, reminding us that salvation comes from the Lord.