"According to Revelation, the angels who participate in the life of the Trinity in the light of glory, are called to play their part in the history of the salvation of man, in the moments established by Divine Providence.
'Are they not all ministering spirits sent forth to serve, for the sake of those who possess salvation?' asks the author of the Letter to the Hebrews. (1:14) This is believed and taught by the Church, on the basis of Sacred Scripture, from which we learn that the task of the good angels is the protection of people and solicitude for their salvation." (Pope John Paul II, General Audience, 6 August 1986)