12 Here also it must be added, as the Fathers and Doctors of the Church have clearly taught, that virginity is not a Christian virtue unless we embrace it "for the kingdom of heaven;" that is, unless we take up this way of life precisely to be able to devote ourselves more freely to divine things to attain heaven more surely, and with skillful efforts to lead others more readily to the kingdom of heaven.
Source: Sacra Virginitas (Vatican.va)