Noah knew the secret
Noah's setting out to build the Ark strikes me as a great act of love. He did it to obey God's command.
I'm sure there were many hot days when he would rather have been doing something else besides hammering nails into wood or packing up supplies or organizing animals. But, something kept Noah going. And, I am so glad!
Noah knew this secret: once God gives you a direction you'll be the most happy if you follow it.
In Noah's case, it saved his life. It also saved the lives of his loved ones...and those of us who came after!