Genesis 7:1 And the Lord said unto Noah, Come and all thy house into the ark; for thee have I seen righteous before me in this generation.
Noah responded to God’s Word and Promise by believing His Grace. His faith was counted to him as righteousness. Out of all the people on earth, Noah and his family were the only ones whom God saw as righteous, meaning they believed God and trusted His grace for forgiveness. As the tenth generation from Adam through Seth he carried the Seed of the Promise of a Deliverer. He had faith; God saw him as righteous. Noah had faith in grace.
The outward evidence of his inward faith was seen in his obedience to the Lord’s commands to build an ark. In the same way, we who believe in Jesus are accounted as righteous (that’s what God sees), and we show the evidence of faith by our submission to Jesus as Lord and living His Commandments.
The Lord’s response to Noah’s, and our, faith and imputed righteousness is “Come into the ark.” The ark is Jesus and the Kingdom of God. ”Unless one is born of water and the Spirit he cannot enter the kingdom of God” And at the final Judgment the Lord will say to the believers, ”Come, inherit the kingdom prepared for you.” ”Enter into the joy of the Lord.” The righteous live by faith.