Ecclesiastes 3:9 (Berean Study Bible)
What does the worker gain from his toil?
The worldly man who only lives for this life and world is disgusted with the meaningless of his life. King Solomon, who was considered the wisest man of his time and enjoyed every natural pleasure in his life was still thirsty at the end of his life. The carnal man is burdened by the meaningless of the birth-life-death cycles. But as the Apostle Paul warned us, we are not to be like those men. Our purpose in life is not to simply live, eat, enjoy today and die in a pointless existence, but to build the eternal and everlasting kingdom of God. Everywhere that God puts us, our sole purpose is to proclaim the gospel and be a witness unto Jesus of Nazareth. That's the only meaningful labor we are blessed with in this meaningless life.