Such is the state of spiritual perfection, such the fullness of Christ that St Paul exhorts us to attain when he says: ‘… so that you may be filled with the whole fullness of Christ’
This passage explicitly defines the state of spiritual perfection as total assimilation to Christ through the Holy Spirit, with the fruits of the Spirit rendered immutable in the perfected soul.
, The Philokalia, Volume 4, 1995thesis