"When God looked down on this bloodshed and wickedness, He knew that before long... ...man would destroy not only his own body, but his soul." If we live in right relationship with God, we will listen to Him and man would not destroy his soul. Therefore, in order for us to stay healthy mentally, we need to believe in and listen to God.
"When Noah told them there was a flood coming to destroy every living thing on earth, except those that were in the ark......the unbelieving people were certain the old man had lost his mind. And there was nothing Noah could say that made any difference." Noah was trying to help his neighbors by warning them of the flood, but they did not listen to him. So,