Resumen:
Overcoming extrinsecism is an urgent task in the defense of the rationality of theology. M. Blondel's (1861-1949) thought, as it appears in his early works, provides elements capable of sustaining this improvement. This paper examines the different levels in Blondelian philosophy of action's process of achieving unity in knowledge and reality: the dialectic of action, the mediation of action, the immanent and anonymous supernatural, and the Mediator. Taking the Mediator as a starting point, it is possible to avoid all kinds of separation that harm theology's rational consistency while considering the Christian mystery.