Abstract
The present article takes up the Brabantine mystical author Jan van Ruusbroec (1293-1381) , and investigates his criticism against heresies in his work Vanden XII Beghinen. In this work Ruusbroec is dealing with heretical doctrines that insist on the total unity between God and the human person on the level of nature and essence, and deny the role of Christ and the Catholic Church. On the other hand, he is defending his own understanding of the unity in his Boecsken der Verclaringhe. In 1329, the teachings of the German Dominican Meister Eckhart, who was preaching the total unity between God and the human person, were condemned by the papal bull In agro dominico (1329). Under the deep impact of this event, Ruusbroec seems to intend to reconstruct the theme of unity between God and the human person, which was tested by this condemnation, on the foundation of Catholic doctrine. The purpose of this article is to clarify his intention by analyzing his works, and to situate him in the current of the mystical theme of unity in the post-Eckhartian era.
