1Co 1:30 He is the source of your life in Christ Jesus, whom God made our wisdom and our righteousness and sanctification and redemption.
This verse is an argument AGAINST imputed righteusness. It says that God has made Christ our wisdom as well as our righteousness. So if His righteousness is merely imputed to us, then that means His wisdom is only imputed to us. What does that mean? And the same with sanctififaction. Our sanctification is merely fictional.
Imputed righteousness is fictional righteusness. It means that God sees us as if we were righteous, even though we are actually unrighteous, because we are clothed with the righteousness of Christ. Martin Luther said something about us being hills of dung covered with snow.
But I have a problem with this idea that God sees us as being righteous even though we actually are not. Does not God see all, and knows all? Does He not know our innermost thoughts? So how did God cause himself to become blind so that He does not see what everyone else sees?
For 2,000 years of Christianity, both Western Christians and Eastern Christians believed we must actually be rigtheous in order to enter heaven, that righteousness being a gift of God through faith. Joseph was commanded to call the child Jesus because "he will save them from the sins", not "he will save them from the guilt of sin". Jesus wants to be a full Savior, not just from the guilt of sain from from sin itself. Jesus sald that not every who say "Lord, Lord" will enter heaven, but he to DOES the will of his Father. He said nothing about "imputed righteousness". The Apostle Paul wrote that he who is righteous is righteous, that is, that only he who is actually righteous will be declare by God to be righteous.
Yes, definitely Christ is my righteusness - Him living His life through me so that by His grace I am actually righteous. In the same way, Christ is my wisdom - Him living His life through me so that I am actually walking in His light and being actually wise. I do not see much benefit in "imputed" wisdom.