Righteousness is true because it is granted to us through Christ, who took our sins and made us the righteousness of God in Him.
Righteousness according to scripture is the quality of being justifiable in the sight of God. We are told that our own righteousness is like filthy rags (Isaiah 64:6), but through Christ's sacrifice, we are made the righteousness of God (2 Corinthians 5:21). Christ bore our sin and guilt, and in doing so, He allows us to stand before God justified not by our works but by His grace alone (Romans 3:24). This righteousness is available freely to those who believe, signifying the truth of our justification comes through faith in Jesus Christ alone.
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