To have a good idea of God is the truest beginning of piety.
(De libero arbitrio I, 2,5)
Great misery is the proud man, but greater mercy is the humble God.
(De cat. rud. IV, 8)
The faithful know that it is the Body of Christ if they don't neglect to be the Body of Christ. May they become the Body of Christ if they want to live of the Spirit of Christ.