CCC 2700

Through his Word, God speaks to man. By words, mental or vocal, our prayer takes flesh. Yet it is most important that the heart should be present to him to whom we are speaking in prayer: "Whether or not our prayer is heard depends not on the number of words, but on the fervor of our souls."² St. John Chrysostom, Ecloga de oratione 2: PG 63, 585PG — Patrologia Graeca (Migne).