the superiority of consecrated virginity over the married life
I say to the unmarried, and to the widows: It is good for them if they so continue, even as I. But if they do not contain themselves, let them marry.[...]
He that is without a wife, is solicitous for the things that belong to the Lord, how he may please God. [33] But he that is with a wife, is solicitous for the things of the world, how he may please his wife: and he is divided. [34] And the unmarried woman and the virgin thinketh on the things of the Lord, that she may be holy both in body and in spirit. But she that is married thinketh on the things of the world, how she may please her husband.
(1 Corintians 7:8-9,32-34)