Nicene and Post-Nicene Fathers, Ser. II, Vol. XI:
The Works of John Cassian.: Chapter VII. What constitutes our end and perfect bliss.

p. 404

Chapter VII.

What constitutes our end and perfect bliss.

For then will be perfectly fulfilled in our case that prayer of our Saviour in which He prayed for His disciples to the Father saying “that the love wherewith Thou lovedst Me may be in them and they in us;” and again: “that they all may be one as Thou, Father, in Me and I in Thee, that they also may be one in us,” 1670 when that perfect love of God, wherewith “He first loved us” 1671 has passed into the feelings of our heart as well, by the fulfilment of this prayer of the Lord which we believe cannot possibly be ineffectual. And this will come to pass when God shall be all our love, and every desire and wish and effort, every thought of ours, and all our life and words and breath, and that unity which already exists between the Father and the Son, and the Son and the Father, has been shed abroad in our hearts and minds, so that as He loves us with a pure and unfeigned and indissoluble love, so we also may be joined to Him by a lasting and inseparable affection, since we are so united to Him that whatever we breathe or think, or speak is God, since, as I say, we attain to that end of which we spoke before, which the same Lord in His prayer hopes may be fulfilled in us: “that they all may be one as we are one, I in them and Thou in Me, that they also may be made perfect in one;” and again: “Father, those whom Thou hast given Me, I will that where I am, they may also be with Me.” 1672 This then ought to be the destination of the solitary, this should be all his aim that it may be vouchsafed to him to possess even in the body an image of future bliss, and that he may begin in this world to have a foretaste of a sort of earnest of that celestial life and glory. This, I say, is the end of all perfection, that the mind purged from all carnal desires may daily be lifted towards spiritual things, until the whole life and all the thoughts of the heart become one continuous prayer.

Footnotes

S. John 17:26, 21.

1 John iv. 16.

S. John xvii. 22-24.