The Mass and the Intercession of the Saints.
"Celebrating Mass" line art image from The Catholic Library
"We beseech Thee, O Lord, defend us from all dangers of soul and body; and through the intercession of the blessed and glorious Mary ever Virgin, Mother of God, with blessed Joseph, Thy blessed Apostles Peter and Paul...and all the Saints, grant us in Thy mercy safety and peace, that all adversities and errors being destroyed, Thy Church may serve Thee with secure freedom. Through the same our Lord Jesus Christ, Thy Son, Who lives and reigns with Thee, in the unity of the Holy Ghost, God, world without end. Amen."
-Collect from the "To Implore the Intercession of the Saints" votive commemoration in the 1962 Roman Missal.