|Zhendao zizheng 真道自證 . [眞道自證]. [Fujen-ZKW 098R]|
|Zhendao zizheng 真道自證 / Sha Shouxin 沙守信 (Emeric de Chavagnac）|
Title page dated 康熙辛丑年 
In collection: Xujiahui cangshulou Ming-Qing Tianzhujiao wenxian xubian 徐家匯藏書樓明清天主教文獻續編. --78. 真道自證 （沙守信 Emeric de Chavagnac）
Cf. Ad Dudink & Nicolas Standaert, Chinese Christian Texts Database (CCT-Database).
“ ... after the Edict of Toleration (1692) ... the need for a dialogue had diminished and catechetical writings had become to a greater extent mere expositions of European catechists, while refutation of Chinese teachings, especially of Buddhism and Taoism ... has become sharper. In this regard, the title and the contents of a work published in 1718 are revealing: ‘The true way proved by itself’ (Zhendao zizheng 真道自證), in which the author ... only takes recourse to reason (natural religion) and the Bible (revealed religion); he does not adduce the Chinese Classics and Confucianism for support and is silent on Buddhism and Taoism”--Cf. N. Standaert, Handbook of Christianity in China, v.1., p. 614-615.