一徐光启(1562—1633)、李之藻(1565—1630)和杨廷筠(1557—1627)三人,在教会史籍上向有中国“圣教(天主教)三柱石”之称。望题知义,本文旨在探讨导致三人成为天主教徒的环境。命题虽广,作答却不能完全;论其可论,力求不泛,这是我们立意的所在。为此,本文不拟对此事给予“心理的”答案或“宗教的”解 A Xu Guangqi (1562-1633), Li algae (1565-1630) and Yang Tingyun (1557-1627) three people, in the church history to China “Holy Trinity (Catholic) stone ” said. Aspects of the topic, the purpose of this article is to explore the circumstances that led to the three being Catholics. Although the proposition is broad, the answer can not be complete. On the basis of its theory, it can not be generalized. This is where our intention is. For this reason, this article does not intend to give this matter a “psychological” answer or a “religious” solution