Ephesians 6:16
"Above all, taking the shield of faith, wherewith ye shall be
able to quench all the fiery darts of the wicked."

  [4] Faith must be our shield. Above all, or chiefly,
  taking the shield of faith, v. 16. This is more
  necessary than any of them. Faith is all to all in
  us in an hour of temptation. The breast-plate
  secures the vitals; but with the shield we turn
  every way.
This is the victory over the world,
  even our faith.
We are to be fully persuaded
  of the truth of all God's promises and
  threatenings, such a faith being of great use
  against temptations. Consider faith as it
  the evidence of things not seen and the sub-
  stance of things hoped for
and it will be of
  admirable use for this purpose. Faith, as
  receiving Christ and the benefits of his
  redemption, so deriving grace from him,
  is like a shield, a sort of universal defence.
  Our enemy the devil is here called
  wicked one.
He is wicked himself, and he
  endeavors to make us wicked. His temptations
  are called
darts, because of their swift and
  undiscerned flight, and the deep wounds that
  they give to the soul;
fiery darts, by way of
  allusion to the poisonous darts which were
  wont to inflame the parts which were wounded
  with them, and therefore were so called, as the
  serpents with poisonous stings are called fiery
  serpents. Violent temptations, by which the souls
  is set on fire of hell, are the darts which Satan
  shoots at us. Faith is the shield with which we must
  quench these fiery darts, wherein we should receive
  them, and so render them ineffectual, that they
  may not hit us, or at least that they may not hurt us.
  Observe, Faith, acted upon the word of God and
  applying that, acted upon the grace of Christ and
  improving that, quenches the darts of temptation.
  (Matthew Henry, Matthew Henry’s Commentary of the
  Whole Bible, Volume VI., Acts to Revelation, Old
  Tappan: Fleming H. Revell Company, n.d.), 720).

              Ephesians 6:17a
"And take the helmet of salvation, . . ."


Verse 17. Take the helmet of salvation] Or, as it is
    expressed, I Thess. v. 8,
And for a helmet, the hope
    of salvation.
It has already been observed, . . . that
    on the crest and other parts of the helmet were a
    great variety of emblematical figures, and that it is
    very likely that the apostle refers to helmets which
    had on them an emblematical representation of
    hope; viz, that the person should be
safe who wore
    it, that he should be prosperous in all his engage-
    ments, and ever escape
safe from battle. So the hope
    of conquering every adversary, and surmounting
    every difficulty, through the blood of the lamb, is
    as a helmet that protects the head; an impenetrable
    one, that the blow of the battle-axe cannot cleave.
hope of the continual protection, built on the
    promises of God, in which the upright follower of
    Christ feels he has a divine right, protects the
understanding from being darkened and the judg-
    ment from being confused by any temptation of
    Satan, or subtle arguments of the sophistical un-
    godly. He who carries Christ in his heart cannot be
    cheated out of the hope of his heaven.
(Adam Clarke,
    Clarke's Commentary, A Classic Help of Better
    Understanding of the Bible, Matthew - Revelations:  
    Volume VI, Romans to Revelation (Nashville: Abington
    / World Publishing, 1977, 470).
Ephesians 6:17b
" . . . and the sword of the Spirit, which is the word of God:"



       The sword of the Spirit]
. . . The sword of which St. Paul
        speaks is, as he explains it,
the word of God; that is, the
        revelation which God has given of himself, or what we call
Holy Scriptures. This is called, the sword of the Spirit,
because it comes from the Holy Spirit, and receives its ful-
        fillment in the soul through the operation of the Holy
        Spirit. An ability to quote this on occasions, and especially
        in times of temptation and trial, has a wonderful tendency
        to cut in pieces the snares of the adversary. In God's word
        a genuine Christian may have unlimited confidence, and in
        every purpose in which it is applicable it may be brought
        with the greatest effect. The
shield, faith, and the sword-
word of God, or faith in God's unchangeable word,
        are the principal armour of the soul. . . .  
(Adam Clarke,
        Clarke's Commentary, A Classic Help of Better
        Understanding of the Bible, Matthew - Revelations:  
        Volume VI, Romans to Revelation (Nashville: Abington
        / World Publishing, 1977, 470).

When he [Paul] speaks of the Word of God in terms of `the
sword of the Spirit' in Ephesians 6:17ff.,
it is worth noting
that this is the
only attacking weapon in the Christian's
Donald Guthrie, New Testament Theology (Downers
Grove: Inter-Varsity Press, 1981), 560