The True Meaning of the Lord of Heaven
The True Meaning of the Lord of Heaven (天主實義) is a book written by Ricci, which argues that Confucianism and Christianity are not opposed and in fact are remarkably similar in key respects. It was written in the form of a dialogue, originally in Chinese. Ricci used the treatise in his missionary effort to convert Chinese literati, men who were educated in Confucianism and the Chinese classics. In the Chinese Rites controversy, some Roman-Catholic missionaries raised the question whether Ricci and other Jesuits had gone too far and changed Christian beliefs to win converts.
Peter Phan argues that True Meaning was used by a Jesuit missionary to Vietnam, Alexandre de Rhodes, in writing a catechism for Vietnamese Christians.[46]
In 1631, Girolamo Maiorica and Bernardino Reggio, both Jesuit missionaries to Vietnam, started a short-lived press in Thăng Long (present-day Hanoi) to print copies of True Meaning and other texts.[47] The book was also influential on later Protestant missionaries to China, James Legge and Timothy Richard, and through them John Nevius, John Ross, and William Edward Soothill, all influential in establishing Protestantism in China and Korea.