A good mathematician is one who can see analogies between theorems; a great mathematician is one who can see analogies between analogies.
艺术必须要有冲击力。
To write is to breathe, and to breathe is to live.
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。
I don’t think anything is unrealistic if you believe you can do it.