A Jesuit, originally from Hungary, he is the author of numerous spiritual books, among which are Contemplative Retreat: An introduction to the contemplative way of life and to the Jesus Prayer (2003), and The Contemplative Way: Quietly savoring God’s presence (2011). His method of giving the Exercises, in part the fruit of the spiritual experience which he lived during his detention under the Argentine dictatorship, is followed by many individuals and groups, which has made it into a point of reference in the area of spirituality and accompaniment. he died in February 2021