Hilary of Poitiers, on Matt 10:29

“Are not two sparrows sold for a farthing? and not one of them shall fall on the ground without your Father.”

“Figuratively; That which is sold is our soul and body, and that to which it is sold, is sin. They then who sell two sparrows for a farthing, are they who sell themselves for the smallest sin, born for flight, and for reaching heaven with spiritual wings. (vid. Ps. 124:7.) Caught by the bait of present pleasures, and sold to the enjoyment of the world, they barter away their whole selves in such a market. It is of the will of God that one of them rather soar aloft; but the law proceeding according to God’s appointment decrees that one of them should fall. In like manner as, if they soared aloft they would become one spiritual body; so, when sold under sin, the soul gathers earthly matter from the pollution of vice, and there is made of them one body which is committed to earth.”

Imported from an open dataset — not yet checked against the printed edition.