Augustine of Hippo

(ubi sup.) Or, that the virgins go forth to meet the bridegroom alone, I think is to be understood that the virgins themselves constitute her who is called the bride; as we speak of the Christians flocking to the Church as children running to their mother, and yet this same mother consists only of the children who are gathered together. For now the Church is betrothed, and is to be led forth as a virgin to the marriage, which takes place then when all her mortal part having past away, she may be held in an eternal union.