11. ALL HUMANS DIE EVENTUALLY.
Genesis 5:5,8,11,etc. - "So all the days that Adam lived were nine hundred and thirty years; and he died...So all the days of Seth were nine hundred and twelve years; and he died...So all the days of Enosh were nine hundred and five years; and he died..."
Even those who lived on Earth when its environment was more ideal and the gene pool was less corrupted died eventually. Unless the Lord returns first, we who live today will all die. None of us can cheat physical death forever. No matter how much we exercise and watch our diet, we will die. No matter how much wealth or wisdom we acquire, we will die. All that being said, it is still wise to take care of our bodies and both earn and learn what we can. But, may we always remember our own mortality and let us live righteously for the Lord our Judge (cf. Heb. 9:27).
12. IT IS A MISTAKE TO BE CONCERNED WITH OUTER BEAUTY AND NOT CHARACTER.
Genesis 6:2 - "The sons of God saw the daughters of men, that they were beautiful; and they took wives for themselves of all whom they chose."
They saw what was beautiful to the external eyes, and that's what they chose. Men of God should know better, but it is easy to fall prey to this mistake that has been around since the beginning almost. It is an error to be more concerned with outer looks than inner character. God is more focused on good works than good looks (cf. I Tim. 2:9,10). Remember, marriage based on physical beauty alone almost always leads to serious problems because physical beauty does not last (cf. Prov. 31:30).
13. GOD'S PATIENCE HAS A LIMIT.
Genesis 6:3 - "And the LORD said, 'My Spirit shall not strive with man forever, for he is indeed flesh; yet his days shall be one hundred and twenty years."
God loved His creation; He loved mankind dearly. But, He was sickened by their behavior and could only take so much of it. He was forbearing with mankind, but there was a breaking point (cf. 6:5). There came a point when the floodwaters had to be sent, and there will come a point when Jesus must return (cf. Matt. 24:37-39). God's patience still has a limit (cf. II Pet. 3:9).
14. GOD IS GRIEVED WHEN WE SIN.
Genesis 6:6,7 - "And the LORD was sorry that He had made man on the earth, and He was grieved in His heart. So the LORD said, 'I will destroy man whom I have created from the face of the earth, both man and beast, creeping thing and birds of the air, for I am sorry that I have made them.'"
Sin is the violation of God's will, and it breaks His heart when His creation chooses to rebel against Him. God does not rejoice in the destruction of the wicked but rather grieves over it (cf. Eze. 18:32). Nevertheless, He will punish the impenitent when the time is right.
15. EVEN IN THE MIDST OF A WICKED GENERATION, IT IS POSSIBLE TO PLEASE GOD.
Genesis 6:8,9 - "But Noah found grace in the eyes of the LORD...Noah was a just man, perfect in his generation. Noah walked with God."
Noah pleased God because he did his best to obey God (cf. 6:22). God was gracious to him as a result. Today we live in the midst of a wicked generation, but God is still watching for the faithfully obedient.
16. EVERYONE MAKES MISTAKES.
Genesis 9:20,21 - "And Noah began to be a farmer, and he planted a vineyard. Then he drank of the wine and was drunk, and became uncovered in his tent."
Although Noah was a just man, walked with God, and preserved the human race through his obedience, he certainly wasn't without flaw--and neither are any today (cf. Rom. 3:23). May we remember this truth when we are tempted to think that we are above sin (cf. I Cor. 10:12).