"Your name is oil poured out." Of what truth of our interior life does the Holy Spirit wish to assure us by means of this text? He refers to the experience of a twofold operation , one by which he inwardly strengthens the virtues that lead us to salvation, the other by which he outwardly endows us with serviceable gifts. The former is of benefit to ourselves, the latter to our neighbors. For example, faith, hope, and charity are given to us for our own sake, without them we cannot be saved. But the gift of wise and learned speech, the power to heal, to prophesy, and endowments of this kind without which we can fully achieve our own salvation, are undoubtedly meant to be used for our neighbor's salvation. And these operations of the Holy Spirit, that we take note of either in ourselves or in others, are named from their method of functioning: we call them infusion and effusion. To which of them may we suitably apply the words: "Your name is oil poured out"? Is it not to effusion? If he had meant infusion, he would have said "poured in." ... Any man who perceives that he is endowed with an exterior grace enabling him to influence others, can also say to the Lord: "Your name is oil poured out."
—St. Bernard of Clairvaux, Sermon 18 on the Song of Songs