Life of human is definite while knowledge is infinite. It must be of failure that a man seeks for infinite knowledge in his definite life.

• 人的生命是有限的,而知识是无限的。用有限的生命去追逐无限的知识这种尝试是注定会失败的。吾生也有涯,而知也无涯。以有涯随无涯,殆已!