'Doer' in the Bible

because if anyone is a hearer of the message and not a doer, this one is like someone staring at {his own face} in a mirror,

But the one who looks into the perfect law of liberty and continues [to do it], not being a forgetful hearer but a doer who acts, this one will be blessed {in what he does}.

Do not speak evil of one another, brothers. The one who speaks evil of a brother or judges his brother speaks evil of the law and judges the law. But if you judge the law, you are not a doer of the law but a judge [of the law].