"For he satisfieth the longing soul, and filleth the hungry soul with goodness." Psalm 107:9
We are never satisfied because we are eating the food that is never going to satisfy! It is not the manna given from God, so our stomachs will never be full. We want more, and more and more. We don't stop with what God has laid for us that is enough. Now we are making ourselves into God, and serving ourselves more helpings of the world.
"The Lord does not let the righteous go hungry, but he thwarts the craving of the wicked." Proverbs 10:3
"The righteous eat to their hearts’ content, but the stomach of the wicked goes hungry." Proverbs 13:25
"I know what it is to be in need, and I know what it is to have plenty. I have learned the secret of being content in any and every situation, whether well fed or hungry, whether living in plenty or in want." Philippians 4:12