"From its beginning until death, human life is surrounded by their watchful care and intercession. Beside each believer stands an angel as protector and shepherd leading him to life. Already here on earth the Christian life shares by faith in the blessed company of angels and men united in God." (Catholic Catechism of the Catholic Church#336)
In his Angelus message of October 2, 2011 Pope Benedict said, "Dear friends, the Lord is ever close and active in humanity’s history and accompanies us with the unique presence of his Angels, whom today the Church venerates as “Guardian Angels”, that is, ministers of the divine care for every human being. From the beginning until the hour of death, human life is surrounded by their constant protection."