Hebrews 11:7

It was faith that made Noah hear God's warnings about things in the future that he could not see. He obeyed God and built a boat in which he and his family were saved. As a result, the world was condemned, and Noah received from God the righteousness that comes by faith. (Hebrews 11:7)

Three points:

1. Faith

Faith is believing God. Faith isn't a mindless unknowing. There may be solid evidence or a reasonableness for what we believe, thus the role of apologetics.

2. Obey

To obey is to do what God says. There are over 1,000 rules that are given us in the New Testament. Here is a short example:

Love must be completely sincere. Hate what is evil, hold on to what is good. Love one another warmly as Christians, and be eager to show respect for one another. Work hard and do not be lazy. Serve the Lord with a heart full of devotion. Let your hope keep you joyful, be patient in your troubles, and pray at all times. Share your belongings with your needy fellow Christians, and open your homes to strangers. Ask God to bless those who persecute you---yes, ask him to bless, not to curse. Be happy with those who are happy, weep with those who weep. Have the same concern for everyone. Do not be proud, but accept humble duties. Do not think of yourselves as wise. If someone has done you wrong, do not repay him with a wrong. Try to do what everyone considers to be good. Do everything possible on your part to live in peace with everybody. Never take revenge, my friends, but instead let God's anger do it. For the scripture says, "I will take revenge, I will pay back, says the Lord." Instead, as the scripture says: "If your enemies are hungry, feed them; if they are thirsty, give them a drink; for by doing this you will make them burn with shame." Do not let evil defeat you; instead, conquer evil with good. (Romans 12:9-21)

3. Righteousness comes from faith

It is not our works, but our faith. Noah had faith and shows us what faith means. He believed God and did what God said. Wondering about salvation? See The Good Test.