Hard work will pay off.
"Many things grind" is a famous saying, which tells people that nothing can be done as long as they are diligent.
Sun Jing was from the A Jin Dynasty. Every night when studying, in order not to doze off, he tied a rope to his hair and the other end to the beam. Every time he lowers his head, the rope will wake him up. After waking up, he continued to study and studied hard year after year, which made Sun Jing well-read and knowledgeable and became a knowledgeable scholar.
Su Qin was always looked down upon because he failed to get a job in Qin. So he decided to fight for breath. From then on, he studied hard and forgot to eat and sleep. He prepared an awl when he was reading. When he dozed off, he stabbed himself in the thigh with an awl, forcing himself to wake up and concentrate on reading. After doing this for a year, he traveled around the world again. This time, Qi, Chu, Yan, Han, Zhao and Wei were finally persuaded to "unite" against Qin.
In the Western Han Dynasty, there was a farmer's child named Kuang Heng. One night, Kuang Heng found a candle in his neighbor's house, but the light couldn't penetrate it. So Kuang Heng picked up a knife and dug a crack in the wall. So that he can read by candlelight. There is a large family in the same village who can't read, and there are many books at home. Kuang Heng works for him for free, and he wants to read all his master's books. The shopkeeper was moved by it and lent him the book. Kuang Heng studies so hard that many things happen. Finally, he became a learned man.
Only by sticking to the end and persevering, you will succeed one day, just as the saying goes, "good things grind more."