Like sailing against the current, my heart is like a rock. I hope my father will aim high and not be afraid of difficulties until he dies.

? ——————— (Ming) Li Shizhen.

The main meaning of the first two sentences is: since you have chosen your own goals and ideals, you will unswervingly stick to them;

The last two sentences mainly mean that doctors must persevere and work hard if they want to realize their long-cherished wishes and wishes.

This is what Li Shizhen, a medical scientist and pharmacologist in Ming Dynasty, said when he asked his father for advice when he was young and made up his mind to practice medicine. It is also of great enlightening significance to our present era.