...Well done, good and faithful servant! You have been faithful with a few things: I will put you in charge of many things. Come and share your master's happiness! (Matthew 25:21)
The building of the ark is the longest test of faith recorded in the Word of God. For one hundred and twenty years Noah was a preacher of righteousness which included God's impending judgment. He persevered in his faith though all the circumstances were against him. He did not receive any confirmation that he was on the right track, neither did he get any outsider on his side. What faithfulness, to preach, to evangelize for a hundred and twenty years and not have one convert.
Faith does not look for signs or confirmation. It simply follows God's direction and instructions.
To those who walk by faith God says, "Well done!" Not, good and successful servant, but "good and faithful servant." God does not look for success, but for faithfulness. Then those faithful ones may hear the most beautiful words, "come and share your master's happiness!"