While the king sitteth at his table, my spikenard sendeth forth the smell thereof. -Song 1:12

If I understand a Christian aright, he should be a man readily discerned. You do not need to write upon a box that contains spikenard, with the lid open, the word “Spikenard.” You will know it is there; your nostrils would tell you. If a man should fill his pockets with dust, he might walk where he would, and though he should scatter it in the air, few would notice it; but let him go into a room with his pockets full of musk, and let him drop a particle about, he is soon discovered, because the musk speaks for itself. Now true grace, like spikenard or any other perfume, should speak for itself. You know our Saviour compares Christians to lights. There is a crowd of people standing yonder; I cannot see those who are in the shadow, but there is one man whose face I can see well, and that is the man who holds the torch. Its flames light up his face, so that we can catch every feature readily. So, whoever is not discovered, the Christian should be obvious at once. “Thou also wast with Jesus of Nazareth, for thy speech betrayeth thee.” Not only should the Christian be perceptible, but grace has been given to him that it might be in exercise. What is faith, unless it is believing? What is love, unless it is embracing? What is patience, unless it is enduring? To what purpose is knowledge, unless it is revealing truth? What are any of those sweet graces which the Master gives us, unless they yield their perfume? I fear we do not enough gaze upon that face covered with the bloody sweat, for if we did, as sure as the King was thus in our thoughts sitting at His table, we should be more like Him; we should love Him better; we should live more passionately for Him, and should spend and be spent, that we might promote His glory. I just note this point that believers’ graces, like spikenard, are meant to give forth their smell. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/3480.cfm