The general theme of these verses expands on the general theme of the book. Enjoy the light of good times; be happy and banish anxiety from your heart in them with a genuine pure focus for many dark times will come which you will have to deal with. Yet always remember that everything you do in the light and in the darkness God will bring you to judgment (9). After all is over and you stand before him on judgment day you will confess that many decisions if not all are meaningless.
A few things cannot be missed in these verses. First, I have a choice. I will be held accountable therefore it is I who decides.
Second, I can decide to be happy and enjoy life. It is possible to cast off the troubles of the body.
Third, I can decide to sow the seed and the morning and not to let my hands be idle in the evening.
Fourth, both good times and bad times come; more so bad than good. This I have no control over. I am subject to the many decisions of others and happen chance.
Fifth, I am always to keep in the forefront of my mind that God will bring me to judgment. The decision I made has consequences in this life and the next.
Sixth, following the ways of the heart and whatever I see, is a risky way to live. An undisciplined heart can lead to the cause of bad times and good. The brain must also be followed.