The person I am today is no longer the person I was yesterday. This comes from Liang Qichao's "Introduction to Academics in the Qing Dynasty": "I would not hesitate to use the person I am today to make it difficult for me in the past."
"Introduction to Qing Dynasty Academics" is the first monograph on Qing Dynasty studies written by Liang Qichao in 1920. It systematically comments on the development of Chinese academic thought over more than 200 years from Liang Qichao in the Ming Dynasty, and combines natural science, philosophy, classics and the history of the Qing Dynasty to have a profound impact on political thought in history.
Liang Qichao was a famous political activist, enlightenment thinker, propagandist, educator, historian and writer in modern Chinese history. One of the leaders of the Hundred Days Reform. He advocated a "revolution in poetry" and a "revolution in fiction."