Gregory the Dialogist : It is the certain and undoubted judgment of the holy Church that chosen preachers must consider not only what, how much, and when they speak, but also to whom they speak. Hence the Lord too, concealing the word from the knowledge of certain people, forbids the disciples, saying: "Do not cast your pearls before swine" (Matt. 7:6). Likewise Scripture forbids the word to be poured out uselessly, and says: "Where there is no hearing, do not pour out speech" (Ecclus. 32:6). What then does it mean that Jonathan says: "If they say: Wait until we come to you, let us stand in our place; but if they say: Come up to us, let us go up, because the Lord has delivered them into our hands" — unless that the chosen preacher must attentively discern to whom he ought to bring forth the word of life? But because this now seems to be shown in the literal sense, let us express it more subtly. Preachers cross over to sinners when they please those to whom they present words not only by word but also by life. Who then are those who say: "Come up to us," unless those who bring forth signs of devotion, because they both reverently hear the word of salvation and earnestly desire to retain it? Therefore one must ascend to these, in whom, even if there is great labor in the work of ministry, there are also great gains of salvation. — Commentary on 1 Kings, Book 5, Chapter 4