Catechism of the Catholic Church 350:
Angels are spiritual creatures who glorify God without ceasing and who serve his saving plans for other creatures: “The angels work together for the benefit of us all” (St. Thomas Aquinas, STh I, 114, 3, ad 3).
Prayer for Day 6
“Even if the devil is always trying to scratch the face of man, God is stronger; his is the victory and his salvation is offered to every human being.”
Dear angel, my guardian, on this journey of life that leads to heaven, I am never alone. You accompany me and sustain me. You offer me your wings as protection, to overcome the many dangers of earth, to be able to fly above the realities of life that are difficult and drag me down.
Thank you for your protection and your company. May I always hearken to your voice.
With all the choirs of angels, and St. Michael the Archangel, defend me from the devil and his demons. Cast them away from me. Amen.
(Cf. address of Pope Francis at the blessing of St. Michael the Archangel statue in Vatican Gardens)