15 Now it is no wonder, that “while they are going to buy,” while they are seeking for persons by whom to be praised, and find none; while they are seeking for persons by whom to be comforted, and find none; that the door is opened, that “the Bridegroom comes,” and the Bride, the Church, glorified then with Christ, that the several members may be gathered together into their whole. “And they went in with Him into the marriage, and the door was shut.” Then the foolish virgins came afterwards; but had they bought any oil, or found any from whom they might buy it? Therefore they found the doors shut; they began to knock, but too late.
Source: Sermons on Selected Lessons of the New Testament (New Advent)