Ecclesiastes 2:3

2:3 I thought deeply about the effects of indulging myself with wine

(all the while my mind was guiding me with wisdom)

and the effects of behaving foolishly,

so that I might discover what is profitable

for people to do on earth during the few days of their lives.

Ecclesiastes 5:18

Enjoy the Fruit of Your Labor

5:18 I have seen personally what is the only beneficial and appropriate course of action for people:

to eat and drink, and find enjoyment in all their hard work on earth

during the few days of their life which God has given them,

for this is their reward.

Ecclesiastes 6:12

6:12 For no one knows what is best for a person during his life –

during the few days of his fleeting life –

for they pass away like a shadow.

Nor can anyone tell him what the future will hold for him on earth.