Conscious; do by nature things

Romans 2:12-16
All who sin apart from the law will also perish apart from the law, and all who sin under the law will be judged by the law.
It is not those who hear the law who are righteous in God's sight, but it is those who obey the law who will be declared righteous.
Conscious: When Gentiles, who do not have the law, do by nature things required by the law, they are a law for themselves, even though they do not have the law, since they show that the requirement of the law are written on their hearts.
This will take place on the day when God will judge men's secrets through Jesus Christ.
Those who do not have God's law and those who do will be judged, not by what they know but by what they do.
Why?
Nature things: God created this world has rule and regulation, all should know it.
Hear the law or apart from the law, on the day when God will judge men's secrets through will be same, according to what they have done.
For Gentiles, they do by nature things, which is the conscious, written on their heart.
After Jesus came, the new covenant is written on out heart, like those Gentile they do not heart the laws.
How?
Let the law of God written on my heart and do the right things. God will judge everyone equally.