How can we be justified by our words?

Matthew 12:37 teaches that 'by thy words thou shalt be justified, and by thy words thou shalt be condemned.' This verse emphasizes that the confessions we make reveal the condition of our hearts. If our hearts have been transformed by grace through faith, our words will reflect the truth of our justification through Christ. Conversely, if our speech reflects self-righteousness or deceit, it indicates a heart that is not in harmony with God. Therefore, our declarations about Christ and our acknowledgment of our sinfulness are indicators of our standing before God. For a believer, speaking truthfully, acknowledging Christ as the sole source of righteousness, is how one is justified, while falsehood or misrepresentation will lead to condemnation.