How do we know that Noah found grace?

The declaration that Noah found grace in the eyes of the Lord indicates a divine election and mercy from God rather than anything inherently good in Noah himself. Genesis 6:8 highlights that despite the overwhelming wickedness in the world, God's favor rested upon Noah. This act of grace illustrates the sovereignty of God in saving sinners, aligning with the Reformed understanding that salvation is entirely a work of God’s grace, as echoed in Ephesians 2:8-9, which teaches that grace is a gift from God and not a result of our works or efforts. This principle applies to all believers who, like Noah, are saved by grace through faith.