Never forget that the pleasures of the world are sweet, but never the sweetest. It is for the same reason that discontent persists in our life. Our mind knows that worldly riches are pleasing and tempting, but it hardly knows why they are not fully quenching and satisfying. Our mind knows that it desires perfection, but it never knows what the genuine form of perfection is.
We spend our lives in confusion, seeking for an unknown state of happiness. So, everyone is discontented not due to the shortage of sensual comfort, but because of the desire for the best, and the way they act, live, and think never ensures any happiness and perfection in their life.