Much suffering is caused by the inheritance of mortality from Adam and Eve, which includes vulnerability to illness and disease. Also, those who choose to succumb to Satan's temptations may suffer self-inflicted damage to their health. Satan and his demons cause great misery. God has allowed the situation to continue so that mankind can discover that God's rule is better than independent human-rule. He has allowed Satan to cause suffering to challenge Satan's claim that God's creation, humans, would turn from and curse God under pressure.