How do we know that God's grace is effective?

The effectiveness of God's grace is illustrated in the transformational work it accomplishes in the hearts of believers. According to Proverbs 22:19, the Lord makes known to His people the certainty of His words, instilling in them a trust that is solely reliant on Him. This grace is irresistible; it grants a new heart and a new spirit, thus enabling the sinner to believe and respond to the Gospel. Ephesians 2:8-9 establishes that salvation is a gift of grace through faith, not of works, ensuring that the credit for transformation belongs entirely to God.