However, if you fulfill the royal law according to the scripture, "You shall love your neighbor as yourself," you are doing well. But if you show partiality, you commit sin, and are convicted by the law as transgressors.
For whoever keeps the whole law, but falls short in one particular, has become guilty in respect to all of it. For he who said, "You shall not commit adultery," also said, "You shall not kill." Even if you do not commit adultery but kill, you have become a transgressor of the law.
What good is it, my brothers, if someone says he has faith but does not have works? Can that faith save him? If a brother or sister has nothing to wear and has no food for the day, and one of you says to them, "Go in peace, keep warm, and eat well," but you do not give them the necessities of the body, what good is it? So also faith of itself, if it does not have works, is dead.
James 2:8-11, 14-17
Not many of you should become teachers, my brothers, for you realize that we will be judged more strictly, for we all fall short in many respects. If anyone does not fall short in speech, he is a perfect man, able to bridle his whole body also.
For every kind of beast and bird, of reptile and sea creature, can be tamed and has been tamed by the human species, but no human being can tame the tongue. It is a restless evil, full of deadly poison. With it we bless the Lord and Father, and with it we curse human beings who are made in the likeness of God.
James 3:1-2, 7-9