Qoheleth is hitting bottom. He has sought to fill his heart with things that cannot fill it. Some have said that we have a God-shaped hole in our hearts, and only God can fill it. But we all, to varying extents, try to fill it with possessions, pleasure, position, and power. The Four Big Ps. Because they fail, we seek over and over to find that satisfaction, that sense of fulfillment, by trying over and over. This is the beginning of every addiction, which is a desperate, frantic seeking to fill and numb the emptiness within.
Like Qoheleth, we must realize that only in God do we find the peace, the fulfillment, the happiness that we seek.
—Fr. Mike Comer