'Doer' in the Bible

Because if any man is a hearer of the word and not a doer, he is like a man looking at his natural face in a glass;

But he who goes on looking into the true law which makes him free, being not a hearer without memory but a doer putting it into effect, this man will have a blessing on his acts.

Do not say evil against one another, my brothers. He who says evil against his brother or makes himself his brother's judge, says evil against the law and is judging the law: and in judging the law you become, not a doer of the law but a judge.