{Him who knew no sin} (	on m(8820)gnonta hamartian). Definite
claim by Paul that Jesus did not commit sin, had no personal
acquaintance (m(8820)gnonta, second aorist active participle of
gin(9373)k(935c)) with it. Jesus made this claim for himself ( Joh
8:46 ). This statement occurs also in  1Pe 2:22  Heb 4:15  7:26  1Jo 3:5 . Christ was and is "a moral miracle" (Bernard) and so
more than mere man. {He made to be sin} (hamartian epoi(8873)en).
The words "to be" are not in the Greek. "Sin" here is the
substantive, not the verb. God "treated as sin" the one "who knew
no sin." But he knew the contradiction of sinners ( Heb 12:3 ).
We may not dare to probe too far into the mystery of Christ's
suffering on the Cross, but this fact throws some light on the
tragic cry of Jesus just before he died: "My God, My God, why
didst thou forsake me?" ( Mt 27:46 ). {That we might become}
(hina h(886d)eis gen(936d)etha). Note "become." This is God's purpose
(hina) in what he did and in what Christ did. Thus alone can we
obtain God's righteousness ( Ro 1:17 ).