• Letter to the Bishops of the Catholic Church on Some Aspects of Christian Meditation
(III. Erroneous Ways of Praying, "12. With the present diffusion of eastern methods of meditation in the Christian world and in ecclesial communities, we find ourselves faced with a pointed renewal of an attempt, which is not free from dangers and errors, to fuse Christian meditation with that which is non-Christian." . . . avoid the danger of falling into syncretism.)