Also called tutelary angels, the well established and widely accepted belief that all people (as well as nations, cities, and churches) have a special angel who stays with them, watching over their lives and encouraging their spiritual well-being and happiness.
Many deny that guardian angels could possibly exist, but others state, with the support of Scripture, theological writings, and common sense, that they do live, even if mortals forget or refuse to acknowledge their presense.
The idea of the guardian angel is found in Judaism, Christianity, and Islam, and the roots of the belief date to the earliest times. St. Thomas Aquinas, one of history’s foremost experts on angels, stated that all people have guardian angels. They remain with one throughout life, staying ever at one’s side even during sin. They foster good works and help to direct the soul to salvation, but only if the soul is so inclined to be led.They cannot influence the will, but they do act upon the senses and project themselves upon the imagination and intellect, discouraging evil acts.
According to Thomas, the angels remain even after death, standing with the soul in heaven; there, however, it does not encourage salvation, but assists in the glimpsing of the final brightness of eternal bliss. All guardian angels are taken from the lowest ranks of the celestial hierarchy, namely the choir of angels.