2. The sharp edge of the sword comes from sharpening, and the fragrance of plum blossoms comes from bitter cold. -anonymous

3. It's not a freezing cold, how can plum blossoms smell fragrant. -Feng Menglong

4. What is the road? It is trampled out from the place where there is no road, and opened up from the place where there are only thorns. -Lu Xun

5. A gentleman is always striving for self-improvement. -Wen Tianxiang