Both are only found in Christ
Sins were remitted . They needed redeeming. They needed washing away .
21¶But now the righteousness of God without the law is manifested, being witnessed by the law and the prophets;
22Even the righteousness of God
which is by faith of Jesus Christ unto all and upon all them that believe: for there is no difference:
23For all have sinned, and come short of the glory of God;
24Being justified freely by his grace through the redemption that is in Christ Jesus:
25Whom God hath set forth
to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God;
26To declare,
I say, at this time his righteousness: that he might be just, and the justifier of him which believeth in Jesus.
No this verse ( as the Catholics teach ) is not talking about our past sins .
But all the sins before the cross that were only remitted.