Romans 2:14. The Bible tells us that God made everyone with a conscience. The Bible goes on to say that everyone's conscience has God's standards written in them of what is good and what is bad (Romans 2:14-15, "For when the Gentiles, which have not the law, do by nature the things contained in the law, these, having not the law, are a law unto themselves: Which show the work of the law written in their hearts, their conscience also bearing witness, and their thoughts the mean while accusing or else excusing one another;").

Daniel 5:21. God will ultimately destroy people that continue to display selfish behavior. God does not desire to destroy us because He is a loving God, but just as a loving parent He will punish us. A good example of this is what happened with King Nebuchadnezzar in the book of Daniel. The king had become proud, and God brought him down to correct him. God made "his heart... like the beast. For seven years King Nebuchadnezzar lived in a pig sty and ate grass with the oxen.