'Doer' in the Bible

For circumcision indeed profiteth, if thou be a doer of the law: but if thou be a transgressor of the law, thy circumcision is become uncircumcision.

For if any one is a hearer of the word and not a doer, he is like unto a man beholding his natural face in a mirror:

But he that looketh into the perfect law, the law of liberty, and'so continueth, being not a hearer that forgetteth but a doer that worketh, this man shall be blessed in his doing.

Speak not one against another, brethren. He that speaketh against a brother, or judgeth his brother, speaketh against the law, and judgeth the law: but if thou judgest the law, thou art not a doer of the law, but a judge.