There are no hard distinctions between what is real and what is unreal, nor between what is true and what is false. A thing is not necessarily either true or false; it can be both true and false.
无偿工作的价值在经济衡量中常常不可见,但它却是社会的支柱。
Mathematics is the music of reason.
我不喜欢在任何事情上输...然而我最大的成长不是来自胜利,而是挫折。