Are not two sparrows sold for a farthing? and one of them shall not fall on the ground without your Father.
All Commentaries on Matthew 10:29 Go To Matthew 10
Hilary of Poitiers
AD 368
What is sold is the body and soul. It is a sin to sell them to anyone, because Christ redeems from sin and is the Redeemer of body and soul. So when persons sell themselves for the sake of an insignificant sin, it is like two sparrows being sold for a penny. They were born for flying and to be carried to heaven on spiritual wings, but they are overtaken by the price of their immediate pleasures, and by such actions they trade away all their eternal treasures for the sake of temporal luxury.