释义：强调意识形态斗争的极端重要性。
"世界是一个影子，而影子是一个谎言。"
The pursuit of knowledge is a never-ending journey, and each discovery opens the door to new questions.
The secret of reaping the greatest fruitfulness and the greatest enjoyment from life is to live dangerously.
人都知道说话可以显示自己的优点，但不知说话谨慎可以培养德性；人都知道饮食可以有益生命，却不知节制饮食可以养生。