Romans 2:13-15

2:13 For it is not those who hear the law who are righteous before God, but those who do the law will be declared righteous. 2:14 For whenever the Gentiles, who do not have the law, do by nature the things required by the law, these who do not have the law are a law to themselves. 2:15 They show that the work of the law is written in their hearts, as their conscience bears witness and their conflicting thoughts accuse or else defend them,