Hilary of Poitiers
Patristic
c. A.D. 310–367
“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.”