READ: 2 Timothy 3:1-2
Because that, when they knew God, they glorified him not as God, NEITHER WERE THANKFUL; BUT BECAME VAIN IN THEIR IMAGINATIONS, AND THEIR FOOLISH HEART WAS DARKENED. :- Romans 1:21
Unthankfulness in a person is a door to many evils. The scripture above shows us clearly that many of the evils and perversions in this world came through unthankfulness. When men discovered more about the creation and discovered the beautiful earth that God had made, they were not thankful.
When they discovered planets, when they discovered the moon and when they discovered the stars, they were not thankful to God. And because they were unthankful, they became vain in their imaginations. Your imaginations become more vain, the more unthankful you are.
As they studied astronomy and filmed planets at close range, they did not give thanks to God. As they saw what Jupiter was really like, and as they were able to take rockets to fly past Saturn, they did not give thanks to God. As they sent aircrafts all the way to Pluto, they did not give thanks to God. Instead of thanking God, they became vain, mad, and insane.
When people fail to be thankful, they are like mad men on the loose. This is what has happened to large sections of the human race. As mankind learned more about the physiology, the anatomy, biochemistry, psychology and other sciences, they did not give thanks to God. As they failed to glorify God for the human body, which they had discovered so much about, they became mad.
When people are unthankful they become almost mad. Their unthankfulness is a form of insanity. Why would you not be grateful for the oxygen you breathe, the air you breathe, the water you drink, the life that God has given you, when there is so much destruction and carnage all around? Can you not recognize the good things that God has done?