 In recent history "Totus tuus" was used by Pope John Paul II as his personal motto to express his personal Consecration to Mary based on the spiritual approach of Louis de Montfort and the Mariology in his works.The pontiff explained the meaning further in his book Crossing the Threshold of Hope where he defines it as not only an expression of piety but also of devotion that is deeply rooted in the Mystery of the Blessed Trinity.According to his Apostolic Letter "Rosarium Virginis Mariae" he borrowed the motto from the Marian consecrating prayer found in the book "True Devotion to Mary" by Louis de Montfort.