I testify to every man who is confessing Christ and denying God, that Christ will profit him nothing; to every man that calls upon God but rejects the Son, that his faith is vain; to every man that sets aside the Spirit, that his faith in the Father and the Son will be useless, for he cannot even hold it without the presence of the Spirit. For he who does not believe the Spirit does not believe in the Son, and he who has not believed in the Son does not believe in the Father. For none “can say that Jesus is the Lord but by the Holy Ghost” (1 Corinthians 12:3), and “No man has seen God at any time, but the only begotten God which is in the bosom of the Father, he has declared him” (1 John 1:18).
— Basil of Caesarea, De Spiritu Sancto, § 27.
