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 AugustineMiracles are not contrary to nature, but only contrary to what we know about nature.
Saint AugustineRemember this. When people choose to withdraw far from a fire, the fire continues to give warmth, but they grow cold. When people choose to withdraw far from light, the light continues to be bright in itself but they are in darkness. This is also the case when people withdraw from God.
Saint AugustineIt is this one Spirit who makes it possible for an infant to be regenerated . . . when that infant is brought to baptism; and it is through this one Spirit that the infant so presented is reborn. For it is not written, 'Unless a man be born again by the will of his parents' or 'by the faith of those presenting him or ministering to him,' but, 'Unless a man be born again of water and the Holy Spirit.' The water, therefore, manifesting exteriorly the sacrament of grace, and the Spirit effecting interiorly the benefit of grace, both regenerate in one Christ that man who was generated in Adam.
Saint AugustineI once laboured hard for the free will of man, until the grace of God at length overcame me.
Saint AugustineGod does not give heed to the ambitiousness of our prayers, because he is always ready to give to us his light, not a visible light but an intellectual and spiritual one; but we are not always ready to receive it when we turn aside and down to other things out of a desire for temporal things.
Saint Augustine