one adjective, powerful impact

The half brother of Jesus had much to say. (James 2:8) He talked about the danger of the tongue for teachers (James 3:1) He also defined "pure religion" (James 1:27).  There is one adjective he used that was absolutely consistent with the teaching of his Brother. It's in the Bible other places, but this description places a priority on its importance. He used it as an encouragement to others.  Christians can know that they are doing well when it's characteristic of their behavior.  

James 2:8   Indeed, if you fulfill the royal law prescribed in the Scripture, Love your neighbor as yourself, you are doing well
Praise God!