How to understand that calligraphy is a unique line art?

Calligraphy, as a line art, exists not only in China, but also in Egyptian characters. Egyptian characters were originally lines, but later they were replaced by letters. Calligraphy lines have been circulating in China for more than 4,000 years, but they have not been lost because of China's long-term administration. In addition, China people are proud of their good handwriting, and a hundred flowers blossom. Calligraphers are gradually willing to form their own language to highlight their individuality, which provides a foundation for the diversity of lines in calligraphy. Therefore, under the different aesthetic pursuits of different calligraphers, lines have a richer language. Therefore, lines have the rhythm of music, the temple spirit of architecture and the aesthetic feeling of dance. In the process of its formation, there are both inheritance and innovation, but as an art, it has not softened western music excessively like China's music, nor pursued western European style blindly like architecture. So calligraphy, as an art, is unique. As a line art, it is full of charm and stands out because of its rich and reasonable changes in starting and closing pens.