What is the source of justification according to the Bible?

According to the Bible, the source of justification is God, as articulated in Romans 8:33: 'It is God that justifies.' This statement emphasizes that justification is a sovereign act of God, initiated by His love and mercy towards His elect. It is grounded in the finished work of Christ, who served as both the redeemer and the surety for those whom God chose before the foundation of the world. The doctrine of justification depicts the profound truth that it is not based on human actions but solely on God's grace through the redemptive work achieved on the cross. Thus, justification unveils the sunshine of God's grace upon sinners, highlighting His sovereign will in the salvation of His people.