Theophylact of Ohrid, on Rom 5:12

“Wherefore as by one man sin entered into this world, and by sin death; and so death passed upon all men, in whom all have sinned.”

“Having said that the Lord Jesus justified us, he turns to the root of evil, to sin and death, and shows that both the one and the other, that is, sin and death, entered the world through one man, Adam, and again by one and the same Man, Christ, were removed. What then does "in him all sinned" mean? That all sinned in Adam. As soon as he fell, through him even those who had not eaten from the forbidden tree became mortal, as though they themselves had also fallen, because he fell.”

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