I was surprised to see folks seeming to invoke that book to support the notion that happiness on earth is a fool's mission, that all is vanity here and can only be reversed after death, in the hereafter.
I must say: it saddens me to hear young people so eagerly renouncing the possibility of their earthly happiness. My view: the bluebird of happiness awaits you here and now, kids, don't let him fly away. (You know what they say about a bird in the hand.)
Anyway, that must be the Good News version of Ecclesiastes. Jennifer Hecht offers quite a different perspective.
Koheleth brushed aside the dream of an afterlife with a simple appeal to reason--Who knows this?--and the conclusion that humans have nothing above the beasts in this regard...But it doesn't follow that simple happiness is unavailable in this life. The recipe's pretty simple.
Love your spouse. Get some work to do, do it with all your might; enjoy the simple
pleasures of food, drink, and love. Everything else is vanity.