Angels are spirits, but it is not because they are spirits that they are angels. They become angels when they are sent. For the name angel refers to their office, not their nature. You ask the name of this nature, it is spirit; you ask its office, it is that of an Angel, which is a messenger.
Saint AugustineYou don't love in your enemies what they are, but what you would have them become by your prayers.
Saint AugustineSince you cannot do good to all, you are to pay special attention to those who, by the accidents of time, or place, or circumstances, are brought into closer connection with you.
Saint AugustineWho can control this when its appetite is aroused? No one! In the very movement of this appetite, then, it has no "mode" that responds to the decisions of the will ... Yet what he wishes he cannot accomplish ... In the very movement of the appetite, it has no mode corresponding to the decision of the will.
Saint Augustine