He who knew no sin became sin so we may become His righteousness.
Jesus did not commit sin to take on the sin of the world. He received the sin of the world and bore our burdens. We can’t do enough righteousness to become righteous as God was righteous.
We have to receive His righteousness. We cannot do it alone.
Matthew 5:48 – Be ye therefore perfect, even as your Father which is in heaven is perfect.