 Although St Louis is perhaps best known for his Mariology and devotion to the Blessed Virgin Mary, his spirituality is founded on the mystery of the Incarnation and is centered on Christ, as is clear in his famous Prayer to Jesus.The Second Vatican Council popularized spiritual movements among Catholics, and some lay Catholics now engage in regular contemplative practices such as centering prayer.Consistent with Vatican II, contemporary spiritual movements usually emphasize the necessity both of an interior relationship with God (private prayer) and works of justice and charity.