1 My brethren, be not many masters, knowing that we
  shall receive the greater condemnation.
   2 For in many things we offend all. If any man
  offend not in word, the same is a perfect man, and
  able also to bridle the whole body.
   3 Behold, we put bits in the horses' mouths, that
  they may obey us; and we turn about their whole body.
   4 Behold also the ships, which though they be so
  great, and are driven of fierce winds, yet are they
  turned about with a very small helm, whithersoever
  the governor listeth.
   5 Even so the tongue is a little member, and
  boasteth great things. Behold, how great a matter a
  little fire kindleth!
   6 And the tongue is a fire, a world of iniquity: so
  is the tongue among our members, that it defileth the
  whole body, and setteth on fire the course of nature;
  and it is set on fire of hell.
   7 For every kind of beasts, and of birds, and of
  serpents, and of things in the sea, is tamed, and
  hath been tamed of mankind:
   8 But the tongue can no man tame; it is an unruly
  evil, full of deadly poison.
   9 Therewith bless we God, even the Father; and
  therewith curse we men, which are made after the
  similitude of God.
  10 Out of the same mouth proceedeth blessing and
  cursing. My brethren, these things ought not so to
  be.
  11 Doth a fountain send forth at the same place sweet
  water and bitter?
  12 Can the fig tree, my brethren, bear olive berries?
  either a vine, figs? so can no fountain both yield
  salt water and fresh.
  13 Who is a wise man and endued with knowledge among
  you? let him shew out of a good conversation his
  works with meekness of wisdom.
  14 But if ye have bitter envying and strife in your
  hearts, glory not, and lie not against the truth.
  15 This wisdom descendeth not from above, but is
  earthly, sensual, devilish.
  16 For where envying and strife is, there is
  confusion and every evil work.
  17 But the wisdom that is from above is first pure,
  then peaceable, gentle, and easy to be intreated,
  full of mercy and good fruits, without partiality,
  and without hypocrisy.
  18 And the fruit of righteousness is sown in peace of
  them that make peace.

...to James chapter 4