It is clear that Noah was made motivated by a deep and abiding respect for God and took the warning of God of this impending crisis very seriously. We know that Noah walked with God. And it is interesting to me that in these scriptures about Noah, Noah does not talk to God like Abraham and Moses did. If you will notice, Noah is only listening to what God has to say and he obeyed. He obeyed everything that God told him to do no matter how difficult it would be. There is no evidence at all that his faith in God ever wavered; and he accomplished a significant undertaking which consumed approximately 120 years. There is no implication of any hesitation of obedience to God on Noah's part.
After God's first set of instructions He gave him, Genesis 6:22 says, "Noah did everything just as God commanded him." And then in Genesis 7:5, it also says, "And Noah did all that the Lord commanded him." And he did not do just that. In II Peter 2:5, it says that Noah was a preacher of righteousness. So during that 120 years, as he was building this enormous construction, he was preaching, he was warning people, and I am sure that Noah became very famous as they watched this huge vessel being constructed. And for what reason? And so I am sure that he had, probably, every day an opportunity to warn the people that they need to repent because there was an approaching doom.
We know that God is a very patient God and loving God, and He waited 120 years. He gave the people every opportunity. There was no takers. To the very day that he finished that, he was preaching God's Word. And I am so sure that during the course of all this time, Noah was being mocked, ridiculed, and even hated for the warnings that he was giving.