There is difference also between a wife and a virgin. The unmarried woman cares for the things of the Lord, that she may be holy both in body and in spirit: but she that is married cares for the things of the world, how she may please her husband.
All Commentaries on 1 Corinthians 7:34 Go To 1 Corinthians 7
Ambrose of Milan
AD 397
The unmarried woman has her wall of virginity, protecting her against the storms of this world. Thus fortified by the enclosure of God’s protection, she is disquieted by no winds of this world.