Einstein once said: “The difference between people lies in their spare time, spare time produces talents, as well as lazy people, drunkards, card fans, and gamblers. This not only makes the difference in work performance, but also distinguishes the high and low life realms. ” To do the math for everyone, there are 168 hours in 7 days a week. After you work 8 hours a day and sleep 8 hours a day, you have 56 hours left in a week. Some people use this time to study, exercise, and improve themselves; others use it to eat, drink, and have fun, squandering and disposing of it at will. One day…