Charity itself is the root, form, and end of the virtues, relating them all to the final end and binding them all to one another simultaneously and in orderly fashion. Hence charity is the weight of a properly ordered attraction and the bond of perfect union. It maintains order as regards the different objects of love, in our desire for them and their effect on us. At the same time it possesses oneness in the habit [of the infused virtue] by having only one end and one object which is most to be loved....
[St. Bonaventure, Breviloquium (5.8.5), Monti, tr., Franciscan Institute Publications (St. Bonaventure, NY: 2005), pp. 202-203.]