17 The five wise virgins came, and “went in.” How many are you, my Brethren, in the profession of Christ's Name! let there be among you the five wise, but be not five such persons only. Let there be among you the five wise, belonging to this wisdom of the number five. For the hour will come, and come when we know not. It will come at midnight, Watch ye. Thus did the Gospel close; “Watch, for you know neither the day nor the hour.” But if we are all to sleep, how shall we watch?
Watch with the heart, watch with faith, watch with hope, watch with charity, watch with good works; and then, when you shall sleep in your body, the time will come that you shall rise. And when you shall have risen, make ready the lamps. Then shall they go out no more, then shall they be renewed with the inner oil of conscience; then shall that Bridegroom fold you in His spiritual embrace, then shall He bring you into His House where you shall never sleep, where your lamp can never be extinguished. But at present we are in labour, and our lamps flicker amid the winds and temptations of this life; but only let our flame burn strongly, that the wind of temptation may increase the fire, rather than put it out.
Source: Sermons on Selected Lessons of the New Testament (New Advent)