恐惧会禁锢你，希望则能让你自由。
证明是一种用于使他人相信数学陈述为真的工具。
东西方文化的融合不仅是可能的，而且对人类进步是必要的。
我不认为有极限。
The fact is that every writer creates his own precursors. His work modifies our conception of the past, as it will modify the future.
