“It is inevitable that life will be not just very short but very miserable for those who acquire by great toil what they must keep by greater toil. They achieve what they want laboriously; they possess what they have achieved anxiously; and meanwhile they take no account of time that will never more return. New preoccupations take the place of the old, hope excites more hope and ambition more ambition. They do not look for an end to their misery, but simply change the reason for it.”
Seneca. On the shortness of life.