Most of the idle are apt to worry. Sorrow to sorrow, life is still so a life, the world is still so a world. Friend: From my many letters, it seems that you are not at peace these days. Trouble is a kind of old age, is a kind of morbid, you are still a eighteen or eighteen years old youth, so depressed, I really worry for you. General people like to talk about the metaphysics, you say trouble, he will be from the "philosophical dictionary" in drag out "world-weariness" "pessimistic philosophy...