On the Christian Faith (De fide)

³⁸ But if they wish to separate the Son, when they read that the Father is the only true God, I suppose that when they read of the Incarnation of the Son: “This is the stone which was set at naught of you builders, which has become the head of the corner;” and further: “There is none other name under heaven given among men, whereby we must be saved;” then they imagine the Father is to be cut off from the benefit of imparting salvation to us. But there is neither salvation without the Father, nor eternal life without the Son.