Augustine, Ad Intra, Ad Extra, and Eternal Generation

Although Augustine never uses the medieval terms ad intra and ad extra he believed that the eternal generation of the Son and the eternal procession of the Spirit take place eternally, entirely within the life of God-nothing external to God was produced.

 

Kevin Giles, The Eternal Generation of the Son: Maintaining Orthodoxy in Trinitarian Theology (Downers Grove, IL: InterVarsity Press, 2012), 9