The supreme purpose of our Fraternity is to aid the Church in her God-given mission of saving souls by working to increase the honor and devotion shown to the Tria Corda, i.e. the Sacred Heart of Jesus, the Immaculate Heart of Mary, and the Chaste Heart of Joseph, and to give its members help and assistance in advancing securely in the way of salvation. The mediate end of the Fraternity is the restoration of Christendom and the public recognition of the Social Reign of Christ the King. The proximate ends of the Fraternity are the propagation of the authentic Magisterium and the perennial Tradition of Holy Mother Church, the application of the same to the social, political, and economic problems of the modern world, and the advance of true piety and genuine devotion.
– from the Rule of the Fraternitas Trium Cordium