1. "Time is a constant, but for diligent people, it is a' variable'. People who use' minutes' to calculate time spend 59 times more time than people who use' hours'. " -Rybakov

2. "Dare to do subtraction in learning is to subtract what the predecessors have solved and see what problems have not been solved, which needs us to explore and solve." -Hua

3. "Genius = 1% inspiration +99% sweat." Edison

4. "Take some time to think about what you did in a day, whether it was' plus sign' or' minus sign'. If it is'+',you will make progress; If it is'-',you have to learn from it and take measures. " Dimitrov

5. "Einstein, the greatest scientist in modern times, wrote a formula when talking about the secret of success: a = x+y+z Y+Z. He explained that A stands for success, X stands for hard work, Y stands for the correct method, and Z stands for less empty talk." -Einstein