Romans 2:13-15

13for it is 1not the hearers 2of the Law who are 3righteous before God, but the doers 4of the Law who will be justified.

14For when Gentiles who do not have 5the Law 67instinctively perform the requirements of the Law, these, though not having 8the Law, are a law to themselves,

15in that they show 9the work of the Law written in their hearts, their conscience testifying and their thoughts alternately accusing or else defending them,