Romans 2:12-15

When people who have never been exposed to the laws of Moses commit sin, they will still perish for what they do. And those who are under the law of Moses and fail to obey it are condemned by the law. For it’s not merely knowing the law that makes you right with God, but doing all that the law says that will cause God to pronounce you innocent. For example, whenever people who don’t possess the law as their birthright commit sin, it still confirms that a “law” is present in their conscience. For when they instinctively do what the law requires, that becomes a “law” to govern them, even though they don’t have Mosaic law. It demonstrates that the requirements of the law are woven into their hearts. They know what is right and wrong, for their conscience validates this “law” in their heart. Their thoughts correct them in one instance and commend them in another.