For instance, we know that we want good food and nice clothes, comfort of living and every convenience for moving about; honor, possessions, and all necessary means for the satisfaction of our vanity, all of which for the moment appear to us as our life's only demands; but neither they nor their joy remain with us constantly. We then come to think that what we had was but a little and that perhaps more would satisfy us, and still more would suffice our need; but this is not so. Even if the whole universe were within our grasp it would be impossible fully to satisfy our life's demands.