Genesis 6:6 And it repented the LORD that he had made man on the earth, and it grieved him at his heart. 7 And the LORD said, I will destroy man whom I have created from the face of the earth; both man, and beast, and the creeping thing, and the fowls of the air; for it repenteth me that I have made them. 8 But Noah found grace in the eyes of the LORD.
Think about this. Only one man, one man, out of all that were on the earth at that time found favor in God by Gods grace. Eight people were saved that day of the flood, Genesis 7:13.
Ephesians 2:8 For by grace are ye saved through faith; and that not of yourselves: it is the gift of God:
Now, because of Noah and more importantly Gods grace can we all come to faith that is Christ Jesus as God calls us unto salvation.