What does the Bible mean when it says Christ is made unto us righteousness?

When the Bible states that Christ is made unto us righteousness, as noted in 1 Corinthians 1:30, it emphasizes that Christ embodies and provides the righteousness that we need for salvation. This is not a righteousness based on our works or efforts, but one that is imputed to us through faith in His finished work. The idea is that believers are not merely given righteousness but are united to Christ, who Himself is our righteousness. This view holds significant implications for Christian assurance, as it means our standing before God is secure, not in our performance but in Christ's righteousness covering us.