What says the Lord’s command? “Baptizing them in the Name of the Father and of the Son and of the Holy Ghost (S. Matt. xxviii. 19..)” How in the Name of the Father? Because He is the primal cause of all things. How in the Name of the Son? Because He is the Maker of the Creation. How in the Name of the Holy Ghost? Because He is the power perfecting all. We bow ourselves therefore before the Father, that we may be sanctified: before the Son also we bow, that the same end may be fulfilled: we bow also before the Holy Ghost, that we may be made what He is in fact and in Name.

— Gregory of Nyssa, On the Baptism of Christ