What is the basis for God's justification of sinners?

The basis for God's justification of sinners is rooted in the doctrine of imputed righteousness, which indicates that Christ's perfect righteousness is credited to believers. This is explicitly shown in Romans 4, where Abraham's faith is accounted for righteousness, independent of his works. Justification is not a matter of personal merit but reflects God's sovereign grace. Romans 8:33 also asserts that it is God who justifies, making the act of justification a divine prerogative. Believers can thus approach God knowing their acceptance is founded on Christ alone.