●How can a person know himself? Not by thinking, but by doing.

—— Goethe (Germany)

●Practice is a great whistleblower, it exposes all deception and self-deception.

——Chernyshevsky (Russia)

●A knowledgeable person who does not practice is equivalent to a bee who does not make honey.

——Saadi (Persia)

●Not hearing is worse than hearing it, hearing it is worse than seeing it, seeing it is worse than knowing it, and knowing it is worse than doing it.

——Xun Kuang (Warring States Period)

●Seeing with the ears is not as good as seeing with the ears, practicing with the feet is not as good as seeing with the eyes, and discerning with the hands is not as good as practicing with the feet.

——Liu Xiang (Han)

●Seeing once is better than hearing a hundred times.

——Ban Gu (Chinese)

●It is easy to see things on paper, but I know that I have to do it in detail.

——Lu You (Song Dynasty)

●Things in the world are better understood by those who hear them than by those who see them, and by those who see them as well as those who live there.

——Lu You (Song Dynasty)