Romans 2:13-14

13Who does God accept as right with himself? It is those people who obey his Law. It is not the people who only know his Law but do not obey them.

14The Gentiles do not have God's Law. But they may still do the right things that the Law teaches. They do right things because of what they themselves think is right. In that way they are showing that they have a certain law in their minds, even though they do not know God's Law.