Just as you don't know the path of the wind, or how bones [develop] in the womb of a pregnant woman, so you don't know the work of God who makes everything.
In the morning sow your seed, and at evening do not let your hand rest, because you don't know which will succeed, whether one or the other, or if both of them will be equally good.
For if a man should live many years, let him rejoice in them all, and let him remember the days of darkness, since they will be many. All that comes is futile.
Rejoice, young man, while you are young, and let your heart be glad in the days of your youth. And walk in the ways of your heart and in the sights of your eyes; but know that for all of these things God will bring you to judgment.