An angel is an intelligent essence, always in motion. It has free will, is incorporeal, serves God, and has been bestowed with immortality. Only the Creator understands its true nature.
John of DamascusAnd all that is therein; Invisible and visible, Their notes let all things blend, For Christ the Lord is risen. Our joy that hath no end.
John of DamascusHe who does not believe according to the tradition of the Catholic Church is an unbeliever.
John of Damascus