The point of the Collect for Purity, the end point of justification by faith, sanctification by whatever means necessary, of the means of grace, of any ascetic life or holy living, is not merely “to be good.” The end point — the telos — of all this God himself. Reading about Richard Hooker, reading The Cloud of Unknowing, thinking about historic asceticism — in all of it I need to keep this in mind.
It is expressed most beautifully by John Cassian, Conference 10.7:
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 You in Me, that they also may be made perfect in one; and again: Father, those whom You have given Me, I will that where I am, they may also be with Me. (John 17:22-24)
(The Orthodox call it theosis.)