St Augustine

St Augustine’s Treatise on the Faith and the Creed

This discourse on the Apostle’s Creed was delivered by St Augustine to a local church council in North Africa.  In this treatise he repeats his classical explanation of the Trinity:
The Father is truly God, the Son is truly God, and the Holy Spirit is truly God.
The Father is not sometimes the Son, and the Father is not sometimes the Holy Spirit, and God is One.  We have God the Father, God the Son, and God the Holy Spirit, but “there are not three Gods in that Trinity, but One God and one substance.” […]