In this work the Carthaginian Churchman St. Quodvultdeus addresses baptized Christians in North Africa, urging them to remain vigilant in their spiritual battle against vices. The metaphor of a ship is used to illustrate the need for guidance from Christ to navigate the dangers of the world. The text emphasizes the significance of Baptism as a cleansing and empowering sacrament, drawing parallels to biblical events such as the crossing of the Red Sea. The author encourages believers to seek spiritual strength and to emulate the virtues of saints, while also denouncing heretical beliefs and affirming the unity of the Trinity.