Psalm 42:1
42:1 To the chief Musician, Maschil, {a} for the sons of
     Korah. As the hart {b} panteth after the water brooks, so
     panteth my soul after thee, O God.

     (a) As a treasure to be kept by them, who were of the
         number of the Levites.
     (b) By these comparisons of the thirst and panting, he
         shows his fervent desire to serve God in his temple.

Psalm 42:3
42:3 {c} My tears have been my meat day and night, while they
     continually say unto me, Where [is] thy God?

     (c) As others take pleasure in eating and drinking, so he
         was altogether given to weeping.

Psalm 42:4
42:4 When I remember {d} these [things], I pour out my soul in
     me: for I had gone with the multitude, I went with them to
     the house of God, with the voice of joy and praise, with a
     multitude that kept holyday.

     (d) That is, how I led the people to serve you in your
         tabernacle, and now seeing my contrary estate, I die
         for sorrow.

Psalm 42:5
42:5 Why art thou cast down, O my soul? and [why] art thou
     disquieted in me? {e} hope thou in God: for I shall yet
     praise him [for] the help of his countenance.

     (e) Though he sustained grievous assaults of the flesh to
         cast him into despair, yet his faith grounded on God's
         accustomed mercies gets the victory.

Psalm 42:6
42:6 O my God, my soul is cast down within me: {f} therefore
     will I remember thee from the land of Jordan, and of the
     Hermonites, from the hill Mizar.

     (f) That is, when I remember you in this land of my
         banishment among the mountains.

Psalm 42:7
42:7 {g} Deep calleth unto deep at the noise of thy waterspouts:
     all thy waves and thy billows are gone over me.

     (g) Afflictions came so thick upon me that I felt
         overwhelmed: by which he shows there is no end to our
         misery till God is pacified and sends help.

Psalm 42:8
42:8 [Yet] the LORD {h} will command his lovingkindness in the
     daytime, and in the night his song [shall be] with me,
     [and] my prayer unto the God of my life.

     (h) He assures himself of God's help in time to come.

Psalm 42:10
42:10 [As] with a sword in my {i} bones, mine enemies reproach
      me; while they say daily unto me, Where [is] thy God?

      (i) That is, I am most grievously tormented.

Psalm 42:11
42:11 {k} Why art thou cast down, O my soul? and why art thou
      disquieted within me? hope thou in God: for I shall yet
      praise him, [who is] the health of my countenance, and my
      God.

      (k) This repetition declares that David did not overcome
          at once, to teach us to be constant, for as much as
          God will certainly deliver his.