The sermon uses the tenth plague and the institution of the Passover in Exodus to illustrate the imminent return of Christ and the need for spiritual readiness. It contrasts the judgment awaiting those outside the blood with the hope and deliverance promised to believers who are prepared for the great exodus into eternity. The preacher emphasizes laying up heavenly treasures rather than earthly wealth, maintaining a vibrant testimony through obedience, and feasting on God's word to sustain faith during trials. Urging the audience to recognize the shortness of time and the terror of eternal separation from God, the message calls for personal salvation and active evangelism. Ultimately, it encourages a life of gratitude and worship in anticipation of meeting the Lord in the air.