No matter how strong you are, you can only gain authority or success in a field similar to yours, and learning everything is even more unattainable.

Learning is like a circle. When you have rich experience and skills, you can take a small step outside the circle, but in contrast, you will find that you will encounter more problems and more unknowns.

There is no end to learning. Only by finding the direction you like and paying for it is the right way.

To strive for perfection and achieve good results, we must seize the opportunity and make further progress.

Books are the ladder of progress, but only by reading the right books and your favorite books can you really learn, understand and make progress.