'Doer' in the Bible

For circumcision indeed profits, if you are a doer of the law, but if you are a transgressor of the law, your circumcision has become uncircumcision.

For if anyone is a hearer of the word and not a doer, he is like a man looking at his natural face in a mirror;

But he who looks into the perfect law of freedom, and continues, not being a hearer who forgets, but a doer of the work, this man will be blessed in what he does.

Don't speak against one another, brothers. He who speaks against a brother and judges his brother, speaks against the law and judges the law. But if you judge the law, you are not a doer of the law, but a judge.