Abstract
The Church tradition names St Ambrose of Milan a planus atque suavissimus doctor, a plain and most sweet teacher. This title characterises his art of preaching: the clarity of his exposition, "sweetness" or delight of his sermons and teaching based on a deep knowledge of the Scriptures and the current theology.
The paper shows that Ambrose himself saw preaching as a key and indispensable element of the bishop ministry. This ministry has to spring from various currents of the "ocean of the Scriptures" in which Ambrose himself used to immerge himself to understand its hidden meanings.
For Ambrose, the preaching is a priority, the first task and first duty of a bishop. This task finds its roots in a seemingly unproductive action of feeding one's soul with Christ in the reading and the study of the Scripture.
Nevertheless, it becomes an opportunity to affront the "storms" of the world, that cone come down at any time, endangering the voyage of the Church, with courage