Ec 3:1
3:1 To every [thing there is] a {a} season, and a time to every
    purpose under the heaven:

    (a) He speaks of this diversity of time for two causes first
        to declare that there is nothing in this world
        perpetual: next to teach us not to be grieved, if we
        have not all things at once according to our desires,
        neither enjoy them so long as we would wish.

Ec 3:10
3:10 I have seen the labour, which God hath given to the sons of
     men {b} to be exercised in it.

     (b) Read Ec 1:13.

Ec 3:11
3:11 He hath made every [thing] beautiful in its time: also he
     hath set the {c} world in their heart, so that no man can
     find out the work that God maketh from the beginning to the
     end.

     (c) God has given man a desire and affection to seek out
         the things of this world, and to labour in it.

Ec 3:13
3:13 And also that every man should eat and drink, and enjoy the
     good of all his labour, it [is] the {d} gift of God.

     (d) Read Ec 2:24 and these places declare that we
         should do all things with sobriety and in the fear of
         God, as he gives not his gifts to the intent that they
         should be abused.

Ec 3:14
3:14 I know that, whatever God doeth, it shall be for {e} ever:
     nothing can be added to it, nor any thing taken from it:
     and God doeth [it], that [men] should fear before him.

     (e) That is, man will never be able to prevent God's work,
         but as he has determined so it will come to pass.

Ec 3:15
3:15 That which hath been is now; and that which is to be hath
     already been; and God {f} requireth that which is past.

     (f) God only causes what which is past, to return.

Ec 3:17
3:17 I said in my heart, God shall judge the righteous and the
     wicked: for [there is] a time {g} there for every purpose
     and for every work.

     (g) Meaning, with God, however man neglects his duty.

Ec 3:18
3:18 I said in my heart concerning the state of the sons of men,
     that God might {h} tempt them, and that they might see that
     they themselves are beasts.

     (h) And made them pure in their first creation.

Ec 3:19
3:19 For that which befalleth the sons of men befalleth beasts;
     even one thing {i} befalleth them: as the one dieth, so
     dieth the other; yea, they have all one breath; so that a
     man hath no preeminence above a beast: for all [is] vanity.

     (i) Man is not able by his reason and judgment to put
         differences between man and beast, as concerning those
         things to which both are subject: for the eye cannot
         judge any otherwise of a man being dead than of a
         beast, which is dead: yet by the word of God and faith
         we easily know the diversity as in Ec 3:21.

Ec 3:21
3:21 Who {k} knoweth the spirit of man that goeth upward, and
     the spirit of the beast that goeth downward to the earth?

     (k) Meaning, that reason cannot comprehend that which faith
         believes in.

Ec 3:22
3:22 Wherefore I perceive that [there is] nothing better, than
     that a man should {l} rejoice in his own works; for that
     [is] his portion: for who shall bring him to see what shall
     be after him?

     (l) By the often repetition of this sentence as in
         Ec 2:24,3:12,22,5:17,8:15 he declares that man
         by reason can comprehend nothing better in this life
         than to use the gifts of God soberly and comfortably:
         for to know further, is a special gift of God revealed
         by his Spirit.