For if any be a hearer of the word, and not a doer, he is like unto a man beholding his natural face in a glass: For he beholdeth himself, and goeth his way, and straightway forgetteth what manner of man he was. But whoso looketh into the perfect law of liberty, and continueth therein, he being not a forgetful hearer, but a doer of the work, this man shall be blessed in his deed. James 1:23-25
These verses warn us that we deceive ourselves when we hear the word of God without properly responding. If I look into a mirror, but then choose to ignore my unkempt reflection, the mirror has not benefited me.