1. Gain joy through pain. ——Romain Rolland 2. All unpleasant things in my destiny will be compensated by happiness. ——Gorky. 3. The edge of a sword comes from sharpening, and the fragrance of plum blossoms comes from the bitter cold. ——Common saying. 4. The tragedy of life is not how much people suffer, but what people miss. - Carlyle's famous quote. 5. Although there is a lot of suffering in the world, suffering can always be overcome. ——Helen Keller. 6. When Heaven is about to entrust this person with a great responsibility, he must first strain his mind, strain his muscles and bones, starve his body and skin, and deplete his body. Do not mess up what you do.