From 1901 he lived and studied in exile due to the 1901 French law on associations, which limited the freedom of religious orders in France.
During his time studying philosophy, his spiritual director was Germain Foch, SJ, a German Jesuit who taught the importance of incorporation into Christ.
After a year of personal work in Enghien, Plus spent his tertianship with Father Louis Poullier in 1919–1920.
[1] During the Second World War, Plus lived in seclusion in the La Barde retreat house in the Dordogne, although he continued to preach and write.
The talks Plus gave to soldiers during the First World War laid the foundation for his first two books, God within Us and The Ideal of Reparation.