15 Evidently, then, my brethren, it profits those men nothing to keep virginity, to have continence, to give alms. All those doings which are praised in the Church profit them nothing; because they rend unity, namely, that “coat” of charity. What do they? Many among them are eloquent; great tongues, streams of tongues. Do they speak like angels? Let them hear the friend of the Bridegroom, jealous for the Bridegroom, not for himself: “Though I speak with the tongues of men and of angels, and have not charity, I have become as sounding brass, or a tinkling cymbal.”
Source: Tractates on the Gospel of John (New Advent)