Unpublished during the saint's life time, it has enjoyed the endorsement of the many outstanding popes the Church has been blessed with since its discovery in 1842. John Paul II, in particular, was its tireless champion, crediting True Devotion with a turning-point in his spiritual life, adopting his motto, Totus tuus, from St. Louis.
The key to De Montfort's Marian spirituality is that he considered Our Lady to be the infallible and chosen gate to the heart of Christ - To Jesus through Mary: it is Christ Himself Who is at the centre of True Devotion.