Taking God’s blessings for granted causes us to become vain in our imaginations

[Romans 1:20-21] For since the creation of the world His invisible attributes are clearly seen, being understood by the things that are made, even His eternal power and Godhead, so that they are without excuse, because, although they knew God, they did not glorify Him as God, nor were thankful, but became futile (vain) in their thoughts (imaginations), and their foolish hearts were darkened