However difficult life may seem, there is always something you can do and succeed at.
There is no such thing as a moral or an immoral book. Books are well written, or badly written. That is all.
预测蓬勃发展的积极情绪与消极情绪的比例约为3比1。高于这个比例,人们往往会蓬勃发展;低于这个比例,人们往往会萎靡不振。
抗战将是漫长而艰苦的,但我们的事业是正义的,我们必将胜利。
The study of L-functions is a journey into the hidden patterns of numbers.