How do we know God's grace is effective for salvation?

The effectiveness of God's grace is affirmed in Scripture, which presents salvation as a gift granted to the elect based on God's mercy rather than human works. The psalmist declares that no good thing will be withheld from those who walk uprightly (Psalm 84:11), indicating that those who trust in Christ are recipients of His grace. Moreover, Scripture emphasizes that redemption and salvation are secured by Christ's sacrifice, which pleased the Father, establishing the covenant of grace that ensures the efficacy of His grace for those chosen in Him. Therefore, God's grace transforms lives and guarantees salvation for the elect.