The holy Guardian Angels are not satisfied with illuminating the mind of those under their guidance with the light needed to know God’s will for them and to be saved. They also inspire their charges and procure for them the means to do the good that is proper to them. God uses the angels not only to deliver those entrusted to them from the powers of darkness and make them grow in the knowledge of God but also to help them lead a life worthy of God, so that they will be pleasing to him in every way and produce good works of every sort. The angels are zealous for the good of those in their care, because of the commission they have received from God, the Father of light and of all good. They contribute, as far as they are able, to make those in their care worthy to share the lot of the saints. You share in the ministry of the Guardian Angels by making known to children the truths of the Gospel, which you have been chosen by God to announce. You must teach them how to put these truths into practice, and you must have very great zeal to procure their accomplishment of this practice.
--St. John Baptist de La Salle, Meditations for the Time of Retreat