Athanasius of Alexandria

So far did their impiety go that they proceeded to worship devils and proclaimed them as gods, fulfilling their own lusts.

Christ is the true Son, and so when we receive the Spirit, we are made sons. For it says; ‘you did not receive the spirit of slavery leading you back into fear, but you have received the Spirit of adopted sonship’ (Romans 8:15). But when we are made sons in the Spirit, it is clear that we are called children of God in Christ... And when the Spirit is given to us-the Saviour said: ‘Receive the Holy Spirit’ [John 20:22]- God [The Father] is in us... But when God is in us, the Son is also in us. For the Lord Himself said: ‘I and the Father will come and make our home with him’ [John 14:23]. Next, the Son is life-for He said: ‘I am the life’ [John 14:6]- and so we are said to be given life in the Spirit... But when we are given life in the Spirit, Christ Himself is said to live in us. For it says: ‘I am crucified with Christ. It is no longer I who live, but Christ who lives in me.’ [Galatians 2:19-20]. - "Letters to Separion On the Spirit, Letter 1, Chapter 19"