No pain, no gain. As Edison said: Genius comes from ninety-nine percent perspiration and one percent inspiration. Those so-called geniuses have been doing one thing almost their entire lives. For example, Beethoven practiced piano every day until his fingers were hot; for example, Marie Curie stayed in a laboratory that was harmful to the body every day; for example, Zhong Yong, although smart, was lost to everyone because he did not continue to work hard.

The world is fair, and gains are proportional to costs.