Human beings are all like a puff of breath; great and small alike are worthless. Put them on the scales, and they weigh nothing; they are lighter than a mere breath.
I was determined to learn the difference between knowledge and foolishness, wisdom and madness. But I found out that I might as well be chasing the wind.
I have also learned why people work so hard to succeed: it is because they envy the things their neighbors have. But it is useless. It is like chasing the wind.
How can anyone know what is best for us in this short, useless life of ours—a life that passes like a shadow? How can we know what will happen in the world after we die?