God does not abandon to mere chance any of His handiworks; by His providence He is everywhere present; not a hair falls from the head or a sparrow to the ground without His knowledge. Not content, however, with yielding such familiar help in all things, not content with affording that existence which He communicates and perpetuates through every living being, He has charged His angels with the ministry of watching and safeguarding every one of His creatures that behold not His face. Kingdoms have their angels assigned to them, and men have their angels; these latter it is whom religion designates as the Holy Guardian Angels.
Our Lord says in the Gospel, “Beware lest ye scandalize any of these little ones, for their angels in heaven see the face of my Father.” The existence of Guardian Angels is, hence, a dogma of the Christian faith: this being so, what ought not our respect be for that sure and holy intelligence that is ever present at our side; and how great should our solicitude be, lest, by any act of ours, we offend those eyes which are ever bent upon us in all our ways!
Illustration and text from Pictorial Lives of the Saints With Reflections for Every Day in the Year (New York: Benziger Bros., 1922).