I can still recall Sister Marcella reminding us to leave room for our guardian angel next to us in our seats, thereby helping us to be aware that they were always there with us.
Perhaps the idea of Guardian Angels is passe today or out of favor because of the oversimplification of the understanding of angels or even perhaps because they have been relegated to maudlin sentimentality.
But that is a loss. Angels are not cute cherubs (look them up - not so cute) nor are any of the other muddled beliefs about angels or us becoming angels that pervade modern culture. Angels are the mouthpieces of God - they were created to do the will of God. They are created different from us, we who are created "little less than the angels" (Psalm 8; Hebrews 2)
Guardian angels, differing from the archangels we so often celebrate, stand by us to catch us lest we dash our foot against a stone (Psalm 91; Matthew 4) if we but avail ourselves to the tender care of God.
Angel of God
My guardian dear
To Whom His love
Commits me here
Ever this day
Be at my side
To light and guard
To rule and guide. Amen