The best performance improvement is the transition from the nonworking state to the working state.
When you believe in yourself, you can do anything.
生命中最伟大的荣耀不在于从未跌倒,而在于每次跌倒后都能站起来。
世界是残酷的,我的书反映了这一点。
The beauty of mathematics lies in its ability to describe the world in a precise and elegant way.