James 3:1-6 ASV

1 Be not many [of you] teachers, my brethren, knowing that we shall receive heavier judgment.
2 For in many things we all stumble. If any stumbleth not in word, the same is a perfect man, able to bridle the whole body also.
3 Now if we put the horses' bridles into their mouths that they may obey us, we turn about their whole body also.
4 Behold, the ships also, though they are so great and are driven by rough winds, are yet turned about by a very small rudder, whither the impulse of the steersman willeth.
5 So the tongue also is a little member, and boasteth great things. Behold, how much wood is kindled by how small a fire!
6 And the tongue is a fire: the world of iniquity among our members is the tongue, which defileth the whole body, and setteth on fire the wheel of nature, and is set on fire by hell.