James  

"For if any be a hearer of the word(the word is Jesus), and not a doer(follower of Jesus' commandments[John 14:15-24]), he is like unto a man beholding(seeing) his natural face in a glass: For he beholdeth(sees) himself, and goeth his way, and straightway forgetteth what manner of man he was(forgets who or what he saw). But whoso looketh into the perfect law of liberty(God's law), 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 KJV). 

In the passage quoted, James is using an interesting analogy that comes out as confusing if one does not read it carefully, so let us take this slowly. "For if any be a hearer of the word(The Gospel), and not a doer(follower of Jesus' commandments[John 14:15-24]), he is like unto a man beholding(seeing) his natural face in a glass," (James 1:23 KJV). Firstly, what is the word? The word is Jesus. "And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth," (John 1:14 KJV). Who is the only begotten of the Father? "For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life," (John 3:16 KJV). The son is the one who is the begotten, and Jesus is the son(Matthew 14:33, Luke 8:28). Thus, Jesus is the Word.

Then we get to "... and not a doer ..." (James 1:23 KJV). A doer of what? Of the word, of Jesus' word. "Jesus answered and said unto him, If a man love me, he will keep my words: and my Father will love him, and we will come unto him, and make our abode with him," John 14:23 KJV).

Now we have arrived at James' analogy. "... he is like unto a man beholding(seeing) his natural face in a glass: For he beholdeth(sees) himself, and goeth his way, and straightway forgetteth what manner of man he was(forgets who or what he saw)," (James 1:23-24 KJV). One who does not follow his(Jesus') word is like a man who looks at his reflection, only to forget what he had seen. The point James is getting at to draw absurdity, to say just as it would be absurd for this to occur, it would be absurd for one to not be a doer after hearing the word.

He then concludes with, "But whoso looketh into the perfect law of liberty(God's law), and continueth therein, he being not a forgetful hearer, but a doer of the work, this man shall be blessed in his deed," (James 1:25 KJV). Whoever is to follow God's law, the law of liberty, they are indeed blessed. 

"Let not many of you become teachers, my brethren, knowing that as such we will incur(or be subject to) a stricter judgment," (James 3:1 KJV).

James warns us here that not all should be a teacher as they will get a far harder judgment. If a teacher provides false teaching, this can cause great trouble in the church. Thus, a teacher must be careful with what they teach. They cannot use the title of teacher lightly, but be careful as to not deceive. With our actions as teachers, we must be cautious and fruitful so as to not cause others to stumble in what we stumble with. 

If you cannot be cautious in these matters, it is best to not teach; this is not to say you can not spread the Gospel or other things of that nature, but it is best to confirm what you desire to say with great reproof(and this is so with even teachers). All people ought to be certain what they teach is correct through reproof of both scripture and acquaintances.